LEO wasn't born out of a growth-capital raise but out of crisis management: in 2019, it emerged that Bitfinex exchange (and its parent company, iFinex Inc.) had roughly $850 million frozen at a payment processor called Crypto Capital due to regulatory action. To plug the liquidity gap, iFinex launched the UNUS SED LEO token in May 2019 — the name is Latin for “one, but a lion,” referencing an Aesop's fable (a fox mocks a lion for having only one cub — quality over quantity).
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May 21, 2019: the token launches via private sale, pegged 1:1 to USDT — raising $1 billion in just 10 days, issued simultaneously as an ERC-20 and an EOS token.
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Bitfinex was founded in 2012 by Raphael Nicolle in Hong Kong; today's leadership sits with Giancarlo Devasini (CFO since 2013) and Jean-Louis van der Velde (CEO since 2013) — the same corporate group (iFinex) that also issues Tether (USDT).
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August 2016: Bitfinex is hacked, with 119,756 BTC stolen — this later becomes one source of LEO's burn mechanism (see below).
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February 2021: Bitfinex/iFinex reaches an $18.5 million settlement with the New York Attorney General (NYAG) over reserve transparency — the same case that also affected Tether (USDT), since both share the same corporate group.
Important distinction: LEO is not a standalone blockchain*'s native token, but a utility/fee-discount token for an exchange/corporate ecosystem (iFinex/Bitfinex), similar to BNB'*s early role.