Overview
UNUS SED LEO (“one but a lion” in Latin) is the token of Bitfinex, one of the oldest crypto exchanges, owned by iFinex, which shares owners and managers with Tether.
LEO was created in May 2019, when Bitfinex raised $1 billion by selling it to investors. The money helped cover an $850 million hole after funds held by the payment processor Crypto Capital were seized.
How it works
- Bitfinex users get fee discounts and other benefits for holding LEO.
- Every month, iFinex uses at least 27% of its revenue to buy back and burn LEO, permanently reducing supply.
- LEO exists on Ethereum (and originally also on EOS).
The hack-recovery plan
In 2016, hackers stole about 120,000 BTC from Bitfinex. Years later, US authorities recovered most of it, and in January 2025 a court ruled that about 94,600 BTC should be returned to Bitfinex.
Bitfinex has promised that, after repaying holders of its Recovery Right Tokens, it will use at least 80% of the remaining proceeds to buy and burn LEO, over about 18 months. At today’s bitcoin price this would be a very large buyback compared with LEO’s market value. As of autumn 2026, the transfer of the bitcoin to Bitfinex was still in progress.
The LEO token
| LEO at a glance | |
|---|---|
| Supply (Oct 2026) | about 920 million LEO (started at 1 billion) |
| Price (29 Oct 2026) | about $9.41 |
| All-time high | about $10.61 (May 2026) |
| Market cap | about $8.7 billion (#17) |
LEO is unusually stable: it rarely moves more than a few percent in a day, mainly because few people trade it and buybacks steadily remove supply.
Risks
- Exchange dependence. If Bitfinex’s business or reputation suffered, LEO would too.
- Illiquidity. Most trading happens on Bitfinex; large sales could be hard.
- Concentration. Bitfinex and Tether share leadership; trouble at one could affect the other.
- Timing. The size and timing of the hack-recovery burns depend on court processes and Bitfinex’s decisions.
LEO vs. the competition
| LEO | BNB | OKB | |
|---|---|---|---|
| Exchange | Bitfinex | Binance | OKX |
| Supply mechanism | Monthly burns + hack-recovery burn | Quarterly burns | Fixed at 21 million |
| Blockchain use | ERC-20 token | BNB Chain gas | X Layer gas |
| Trading activity | Low | Very high | Medium |
Our verdict
LEO is one of the more interesting exchange tokens: steady buybacks, low volatility and the potential for a very large burn funded by recovered bitcoin.
But it is a bet on one exchange and its owners, it trades thinly, and the timing of the big burn is uncertain. LEO is a high-risk investment despite its calm price history. Invest only what you can afford to lose.
This review is for information only and is not financial advice.