Looks like Celsius was a Ponzi. See below, after the Twitter comments.
Basically they were borrowing crypto and lending it out for dollars, but didn’t hedge so when they had to pay interest in crypto to their customers, they got screwed if crypto rose and it cost more to buy those coins they promised with the dollars received (even when everything went well otherwise. Why they didn’t hedge this huge short BTC/ETH/etc-long-USD position is beyond me, but they didn’t and just ignored it even after losing hundreds of millions this way…
https://www.bloomberg.com/opinion/articles/2022-07-11/the-price-of-not-buying-twitter
Throughout 2020 and 2021, crypto-assets such as bitcoin and ether substantially appreciated compared to the dollar. Yet Celsius failed to update its ledger in order reflect the increased dollar value of its liabilities at least at any time before 2021. The accounting error masked hundreds of millions of dollars in liabilities that Celsius was not prepared to pay out. When Jason Stone left Celsius, Celsius had a $100-$200 million hole on its balance sheet that it could not fully explain or resolve. Despite this balance sheet insolvency, Celsius continues to take on more customer assets, which means it continues to accrue considerable liabilities to the detriment of its current creditors.
In January 2021, the crypto-markets began a bull cycle which caused Celsius (who had recklessly and fraudulently failed to hedge its investments) to suffer severe exchange rate losses…