Celsius collapse: when 17% yield was too good to be true

What happened to Celsius? Celsius Network, a crypto lender with about 1.7 million customers, froze all withdrawals in June 2022 and filed for bankruptcy on 13 July 2022 with a hole of about 1.2 billion dollars in its balance sheet. It had attracted deposits by paying interest of up to about 17% a year under the slogan "Banks are not your friends". In 2024 Celsius exited bankruptcy and returned part of the money; its founder Alex Mashinsky pleaded guilty to fraud and was sentenced in May 2025 to 12 years in prison.

The pitch was simple: banks pay you almost nothing, so bring your crypto to us and we will pay you a lot. It worked beautifully – until customers discovered the one thing worse than a bank that pays nothing: a "not-bank" that pays 17% and then nothing at all, ever again.

How did crypto lenders make money?#

Platforms like Celsius, Voyager, BlockFi or Gemini Earn (run with the lender Genesis) worked roughly like this:

1. You deposit coins and get interest – often 5–10%, sometimes over 15% a year.
2. The platform lends your coins to others: trading firms, hedge funds, other platforms – often with little or no collateral.
3. To pay the high interest, it also takes risks in DeFi, staking and its own trading.
4. Your deposit is no longer "yours": in the terms you agreed to, you lend the coins to the company. If it goes bankrupt, you are an unsecured creditor.

As long as prices rise and borrowers repay, everything looks fine. When prices crash, the risky borrowers fail – and the platform discovers that the "safe yield" was in fact a bet with your money.

Timeline: the 2022 domino effect#

The chain shows contagion: Terra fell, 3AC lost its bets, the lenders who had lent to 3AC got holes in their books, and their customers rushed to withdraw. You can read how Terra fell in the lesson on the Terra/Luna crash.

Celsius and Alex Mashinsky#

Mashinsky was the face of Celsius. In weekly live videos he told customers that Celsius was safer than a bank, that it did not make risky bets and that it was doing great. According to US prosecutors, the reality was different: Celsius took large risks with customer coins, made losses it hid, and Mashinsky helped prop up the price of the company's own CEL token while secretly selling his own tokens for millions.

In December 2024 Mashinsky pleaded guilty to commodities fraud and securities fraud. On 8 May 2025 a federal judge in New York sentenced him to 12 years in prison and ordered him to forfeit about 48 million dollars.

Customers got part of their money back after the bankruptcy, partly in crypto and partly in shares of a new bitcoin mining company – with claims valued at July 2022 prices, so again in the depth of the bear market.

The other lenders#

• Voyager lent over 650 million dollars to 3AC and lost it. It had also told customers their funds were protected by US deposit insurance (FDIC), which regulators said was false. Two buyers – first FTX, then Binance.US – fell through, and customers recovered only part of their deposits.
• BlockFi survived the summer thanks to a credit line from FTX – and fell together with FTX in November.
• Genesis and Gemini Earn: Genesis lent heavily to 3AC and was hit again by FTX. Gemini Earn customers, whose coins Genesis held, waited about 18 months. After settlements with New York regulators, Gemini said in June 2024 that all Earn customers had received 100% of their coins back.

Warning signs you could have seen#

• Yields too good to be true. If a bank pays 1% and a platform pays 17%, the extra 16% is not a gift. It is the price of a risk somebody is taking with your money.
• "Safer than a bank" without proof. Banks have deposit insurance, capital rules and supervisors. A crypto lender saying it is safer, without any of these, is marketing.
• No information about borrowers. If you do not know who borrows your coins and with what collateral, you cannot judge the risk.
• The platform's own token in the rewards. Celsius paid extra interest in CEL – a token whose price the company influenced.
• Paused withdrawals. Once withdrawals stop, it is usually too late. Treat the first delays and "temporary limits" as a fire alarm.

Coins you hold yourself earn no interest – but nobody can lend them out behind your back. How to keep them safely is explained in the lesson exchange or your own wallet.

Common myths#

• "High yields come from clever DeFi strategies." Sometimes. Often they come from lending to risky borrowers – which is fine right up until it is not.
• "It is regulated, so it is safe." BlockFi had already been fined by the SEC, and Voyager falsely claimed FDIC protection. A logo or a licence in one country does not cover your deposit.
• "Customers got their money back, so it was fine." Most waited years, many got only part, and all were paid at crash prices.

Sources#

• US Attorney's Office SDNY – Celsius founder sentenced to 12 years (2025) (opens in a new tab)
• Federal Reserve and FDIC – letter demanding Voyager stop misleading deposit insurance claims (2022) (opens in a new tab)
• CoinDesk – Gemini announces full recovery of Earn users' assets (2024) (opens in a new tab)