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Celsius(CEL)

Plain-English breakdown of Celsius's whitepaper across three depths.

Launched
2024

~17 min read3 sectionsUpdated May 2026

What Is Celsius?

Celsius was a cryptocurrency lending and borrowing platform that allowed users to earn interest on their crypto deposits and take out loans using crypto as collateral. Founded in 2017, it operated similarly to a bank but for cryptocurrency, offering high yields that attracted millions of users and billions of dollars in deposits.

The CEL token was used within the platform to boost interest rates and reduce borrowing costs. Celsius filed for bankruptcy in July 2022 and is no longer operational.

The Problem It Solved

Traditional banks offer extremely low interest rates on savings — often less than 1% per year. For cryptocurrency holders, the situation was even worse: their assets sat in wallets earning nothing. Meanwhile, there was strong demand from institutions and traders to borrow cryptocurrency for various strategies.

Celsius positioned itself as the bridge between these two groups, offering depositors yields of 5-18% APY (far above bank rates) while lending those deposits to borrowers at higher rates. The difference between what borrowers paid and depositors earned was Celsius's profit.

How It Worked

Think of Celsius as a crypto credit union. Members deposited their cryptocurrency, and Celsius pooled these funds together. The pooled funds were then lent out to institutional borrowers, used in DeFi protocols, or invested in other yield-generating strategies. The returns from these activities were shared with depositors as interest.

Users could also borrow against their crypto holdings. Instead of selling your Bitcoin to get cash (and triggering a taxable event), you could deposit it as collateral and borrow dollars against it. If Bitcoin's price dropped too much, you'd need to add more collateral or risk liquidation.

The CEL token created a tiered reward system: the more CEL you held relative to your deposits, the higher your interest rate tier.

Why It Matters

Celsius serves as one of crypto's most important cautionary tales. Despite managing over $20 billion in assets at its peak, the platform collapsed in 2022 when it couldn't honor withdrawal requests. Investigations revealed risky investment strategies and inadequate risk management.

The Celsius collapse, along with similar failures, accelerated calls for cryptocurrency regulation and highlighted the risks of custodial lending. Today, decentralized alternatives like Aave and Compound offer lending and borrowing through transparent smart contracts, where the rules are enforced by code rather than trusting a company with your funds. The lesson from Celsius reinforced the crypto community's core principle: "not your keys, not your coins."

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