The exchange, formerly one of the worlds largest, sought bankruptcy protection last week, and its CEO and founder resigned. Hours later, the trading firm said there had been unauthorized access and that funds had disappeared. Analysts say hundreds of millions of dollars may have vanished.

The unraveling of the once-giant exchange is sending shockwaves through the industry. Heres a look at the companys collapse so far:

Why did FTX go bankrupt?

Customers fled the exchange over fears about whether FTX had sufficient capital, and it agreed to sell itself to rival crypto exchange Binance. But the deal fell through while Binances due diligence on FTXs balance sheet was still pending.

FTX had valued its assets between $10 billion to $50 billion, and listed more than 130 affiliated companies around the world, according to its bankruptcy filing.

FTX and dozens of affiliated companies including founder Sam Bankman-Frieds hedge fund, Alameda Research filed the bankruptcy petition in Delaware on Friday.

The weeks developments marked a shocking turn of events for Bankman-Fried, who was hailed as somewhat of a savior earlier this year when he helped shore up a number of cryptocurrency companies that ran into financial trouble. He was recently estimated to be worth $23 billion and has been a prominent political donor to Democrats.

Was it hacked, too?

FTX confirmed Saturday there had been unauthorized access to its accounts, hours after the company filed for Chapter 11 bankruptcy protection.

A debate formed on social media about whether the exchange was hacked or a company insider had stolen funds a possibility that cryptocurrency analysts couldnt rule out.

Exactly how much money is involved is unclear, but analytics firm Elliptic estimated Saturday that $477 million was missing from the exchange. FTXs new CEO John Ray III said it was switching off the ability to trade or withdraw funds and taking steps to secure customers assets.

Is my Bitcoin safe?

People who own Bitcoin should be OK if they keep them off exchanges such as FTX that effectively work as a crypto-casino gambling website, said Cory Klippsten, the CEO of financial services firm Swan Bitcoin.

Any exchange is a security risk, said Klippsten. Some are more reputable than others, but he said a better option is to take control of your digital assets. With Bitcoin, you have the option to take self-custody and take your coins off the exchange, he said.

Is FTX under investigation?

The Royal Bahamas Police Force said Sunday it is investigating FTX, adding to the companys woes. The police force said in a statement Sunday it was working with Bahamas securities regulators to investigate if any criminal misconduct occurred involving the exchange, which had moved its headquarters to the Caribbean country last year.

Is anyone else investigating?

Even before the bankruptcy filing and missing funds, the U.S. Department of Justice and the Securities and Exchange Commission began examining FTX to determine whether any criminal activity or securities offenses were committed, according to a person familiar with matter who spoke to The Associated Press last week on condition of anonymity because they could not discuss details of the investigations publicly.

What are the repercussions?

Companies that backed FTX are writing down investments, and the prices of Bitcoin and other digital currencies have fallen. Politicians and regulators are calling for stricter oversight of the unwieldy industry. FTX said Saturday that it was moving as many digital assets as can be identified to a new cold wallet custodian, which is essentially a way of storing assets offline without allowing remote control.

FTX had entered into a number of sports-related deals, some of which are crumbling. The NBAs Miami Heat and Miami-Dade County decided Friday to terminate their relationship with FTX, and will rename the teams arena. Earlier Friday, Mercedes said it would immediately remove FTX logos from its Formula One cars.

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Airline executives say that based on bookings, they expect huge demand for flights over Thanksgiving, Christmas and New Years. Travel experts say the best deals for airfares and hotels are already gone.

On social media, plenty of travelers think they are being gouged. Its an understandable sentiment when government data shows that airfares in October were up 43% from a year earlier, and U.S. airlines reported a combined profit of more than $2.4 billion in the third quarter.

Part of the reason for high fares is that airlines are still operating fewer flights than in 2019 even though passenger numbers are nearly back to pre-pandemic levels.

Fewer flights and more people looking to head home or take vacation for the holidays means two things: Prices will be higher, and we will see flights sell out for both holidays, says Holly Berg, chief economist for travel-data provider Hopper.

Yulia Parr knows exactly what Berg is talking about. The Annandale, Virginia, woman struggled to find a reasonably priced flight home for her young son, who is spending Thanksgiving with his grandmother in Texas while Parr visits her husband, who is on active military duty in California. She finally found a $250 one-way ticket on Southwest, but its not until the Tuesday after the holiday.

Parr figures she waited too long to book a flight.

My husbands kids are flying home for Christmas, she said. Those tickets were bought long ago, so theyre not too bad.

Prices for air travel and lodging usually rise heading into the holidays, and it happened earlier this year. That is leading some travelers in Europe to book shorter trips, according to Axel Hefer, CEO of Germany-based hotel-search company Trivago.

Hotel prices are up absolutely everywhere, he said. If you have the same budget or even a lower budget through inflation, and you still want to travel, you just cut out a day.

Hotels are struggling with labor shortages, another cause of higher prices. Glenn Fogel, CEO of Booking Holdings, which owns travel-search sites including Priceline and Kayak, says one hotelier told him he cant fill all his rooms because he doesnt have enough staff.

Rates for car rentals arent as crazy as they were during much of 2021, when some popular locations ran out of vehicles. Still, the availability of vehicles is tight because the cost of new cars has prevented rental companies from fully rebuilding fleets that they culled early in the pandemic.

U.S. consumers are facing the highest inflation in 40 years, and there is growing concern about a potential recession. That isnt showing up in travel numbers, however.

The number of travelers going through airport checkpoints has recovered to nearly 95% of 2019 traffic, according to Transportation Security Administration figures for October. Travel industry officials say holiday travel might top pre-pandemic levels.

Airlines havent always done a good job handling the big crowds, even though they have been hiring workers to replace those who left after COVID-19 hit. The rates of canceled and delayed flights rose above pre-pandemic levels this summer, causing airlines to slow down plans to add more flights.

U.S. airlines operated only 84% as many U.S. flights as they did in October 2019, and plan about the same percentage in December, according to travel-data firm Cirium. On average, airlines are using bigger planes with more seats this year, which partly offsets the reduction in flights.

We are definitely seeing a lot of strength for the holidays, Andrew Nocella, United Airlines chief commercial officer, said on the companys earnings call in October. Were approaching the Thanksgiving timeframe, and our bookings are incredibly strong.

Airline executives and Transportation Secretary Pete Buttigieg blamed each other for widespread flight problems over the summer. Airline CEOs say that after hiring more pilots and other workers, they are prepared for the holiday mob.

Travel experts offer tips for saving money and avoiding getting stranded by a canceled flight, although the advice hasnt changed much from previous years.

Be flexible about dates and even destinations, although thats not possible when visiting grandmas house. In a recent search, the cheapest flights from Los Angeles to New York around Christmas were on Christmas Eve and returning New Years Eve.

Look into discount airlines and alternate airports, but know that smaller airlines have fewer options for rebooking passengers after a flight is canceled.

Fly early in the day to lower your risk of a delay or cancellation. If something goes wrong, it tends to progress throughout the day it gets to be a domino effect, says Chuck Thackston, general manager of Airlines Reporting Corp., an intermediary between airlines and travel agents.

There are plenty of theories on the best day of the week to book travel. Thackston says its Sunday because airlines know thats when many price-conscious consumers are shopping, and carriers tailor offerings for them.

For the most part, airlines have dodged the accusations of price-gouging that have swirled around oil companies which drew another rebuke this week from President Joe Biden and other industries.

Accountable US, an advocacy group critical of corporations, linked airline delays and cancellations this summer to job cuts during the pandemic and poor treatment of workers. But generally, we would say the airline industry is not currently at the same level as big food, oil or retail in terms of gross profiteering, says Jeremy Funk, a spokesman for the group.

Brett Snyder, who runs a travel agency and writes the Cranky Flier blog about air travel, says prices are high simply because flights are down from 2019 while demand is booming.

How is it gouging? Snyder asks. They dont want to go (take off) with empty seats, but they also dont want to sell everything for a dollar. Its basic economics.

Travelers are sacrificing to hold down the cost of their trips.

Sheena Hale and her daughter, Krysta Pyle, woke up at 3 a.m. and left their northwestern Indiana home an hour later to make a 6:25 a.m. flight in Chicago last week.

We are exhausted, Hale said after the plane landed in Dallas, where Krysta was taking part in a cheer competition. We started early because the early flights were much cheaper. Flights are way too expensive.

Theyre not going anywhere for Christmas.

We dont have to travel. Were staying home with family, Hale said.

Xi and Biden greeted each other with a handshake at a luxury resort hotel in Indonesia, where they are attending the Group of 20 summit of large economies. U.S. officials say Biden aims to build a floor in the relationship between the leaders and nations to identify areas of potential cooperation and to avoid miscalculations between the nuclear powers on areas of disagreement.

Both men entered the highly anticipated meeting with bolstered political standing at home. Democrats triumphantly held onto control of the U.S. Senate, with a chance to boost their ranks by one in a runoff election in Georgia next month, while Xi was awarded a third five-year term in October by the Communist Partys national congress, a break with tradition.

We have very little misunderstanding, Biden told reporters in Phnom Penh, Cambodia on Sunday, where he participated in a gathering of southeast Asian nations before leaving for Indonesia. We just got to figure out where the red lines are and what are the most important things to each of us going into the next two years.

Biden added: His circumstance has changed, to state the obvious, at home. The president said of his own situation: I know Im coming in stronger.

White House aides have repeatedly sought to play down any notion of conflict between the two nations and have emphasized that they believe the two countries can work in tandem on shared challenges such as climate change and health security.

But relations between the U.S. and China have grown more strained under successive American administrations, as economic, trade, human rights and security differences have come to the fore.

As president, Biden has repeatedly taken China to task for human rights abuses against the Uyghur people and other ethnic minorities, crackdowns on democracy activists in Hong Kong, coercive trade practices, military provocations against self-ruled Taiwan and differences over Russias prosecution of its war against Ukraine. Chinese officials have largely refrained from public criticism of Russias war, although Beijing has avoided direct support such as supplying arms.

Taiwan has emerged as one of the most contentious issues between Washington and Beijing. Multiple times in his presidency, Biden has said the U.S. would defend the island which China has eyed for eventual unification in case of a Beijing-led invasion. But administration officials have stressed each time that the U.S.s One China policy has not changed. That policy recognizes the government in Beijing while allowing for informal relations and defense ties with Taipei, and its posture of strategic ambiguity over whether whether it would respond militarily if the were island attacked.

Tensions flared even higher when House Speaker Nancy Pelosi, D-Calif., visited Taiwan in August, prompting China to retaliate with military drills and the firing of ballistic missiles into nearby waters.

The Biden administration also blocked exports of advanced computer chips to China last month a national security move that bolsters U.S. competition against Beijing. Chinese officials quickly condemned the restrictions.

And though the two men have held five phone or video calls during Bidens presidency, White House officials say those encounters are no substitute for Biden being able to meet and size up Xi in person. That task is all the more important after Xi strengthened his grip on power through the party congress, as lower-level Chinese officials have been unable or unwilling to speak for their leader.

Asked about the anticipated meeting, Chinas foreign ministry spokesperson Zhao Lijian said last week at a news briefing that China was looking for win-win cooperation with the U.S. while reiterating Beijings concerns about the U.S. stance on Taiwan.

The U.S. needs to stop obscuring, hollowing out and distorting the One China principle, abide by the basic norms in international relations, including respecting other countries sovereignty, territorial integrity and noninterference in other countries internal affairs, he said.

Xi has stayed close to home throughout the global COVID-19 pandemic, where he has enforced a zero-COVID policy that has resulted in mass lockdowns that have roiled the global supply chains.

He made his first trip outside China since start of the pandemic in September with a stop in Kazakhstan and then onto Uzbekistan to take part in the eight-nation Shanghai Cooperation Organization with Putin and other leaders of the Central Asian security group.

White House officials and their Chinese counterparts have spent weeks negotiating out all of the details of the meeting, which is taking place at Xis hotel with translators providing simultaneous interpretation through headsets.

U.S. officials were eager to see how Xi approaches the Biden sit-down after consolidating his position as the unquestioned leader of the state, saying they would wait to assess whether that made him more or less likely to seek out areas of cooperation with the U.S.

Biden and Xi each brought small delegations into the discussion, with U.S. officials expecting that Xi would bring newly-elevated government officials to the sit-down and expressing hope that it could lead to more substantive engagements down the line.

Before meeting with Xi, Biden first held a sit-down with Indonesian President Joko Widodo, who is hosting the G-20 summit, to announce a range of new development initiatives for the archipelago nation, including investments in climate, security, and education.

Many of Bidens conversations and engagements during his three-country tour which took him to Egypt and Cambodia before he landed on the island of Bali on Sunday were, by design, preparing him for his meeting with Xi and sending a signal that the U.S. would compete in areas where Xi has also worked to expand his countrys influence.

In Phnom Penh, Biden sought to assert U.S. influence and commitment in a region where China has also been making inroads and where many nations feel allied with Beijing. He also sought input on what he should raise with Xi in conversations with leaders from Japan, South Korea and Australia.

The two men have a history that dates to Bidens time as vice president, when he embarked on a get-to-know-you mission with Xi, then Chinas vice president, in travels that brought Xi to Washington and Biden through travels on the Tibetan plateau. The U.S. president has emphasized that he knows Xi well and he wants to use this in-person meeting to better understand where the two men stand.

Biden was fond of tucking references to his conversations with Xi into his travels around the U.S. ahead of the midterm elections, using the Chinese leaders preference for autocratic governance to make his own case to voters why democracy should prevail.

The presidents view was somewhat validated on the global stage, as White House aides said several world leaders approached Biden during his time in Cambodia where he was meeting with Asian allies to reassure them of the U.S. commitment to the region in the face of Chinas assertive actions to tell him they watched the outcome of the midterm elections closely and that the results were a triumph for democracy.

U.S. officials said no joint communique was expected after the meeting with Xi and downplayed expectations for policy breakthroughs. The White House said Biden planned to hold a press after his meeting with Xi.