Exchange custody risk: the FTX lesson

The case studies that wrote the rule

Lesson one introduced the phrase 'not your keys, not your coins.' This lesson is the case file. Three names show up over and over when crypto people talk about exchange risk: Mt. Gox, Celsius, FTX. They are not the only failures, but they're the ones every trader should know.

Mt. Gox was the largest Bitcoin exchange in the early 2010s. In 2014 it collapsed, with hundreds of thousands of bitcoins missing — a mix of hacks, mismanagement, and unclear internal records. Customers waited many years for partial recovery, and some are still waiting. Mt. Gox taught the first generation of crypto users that 'the leading exchange' is a marketing label, not a guarantee.

Celsius was a crypto lending platform that froze withdrawals in mid-2022 and filed bankruptcy soon after. Customers had thought of Celsius as a kind of crypto savings account — high yields, interest paid in kind. When it failed, those balances became unsecured claims. BlockFi followed a similar arc. The pattern repeated: a familiar-feeling 'crypto bank,' a yield product, a sudden freeze, a bankruptcy filing.

FTX was the most public. In November 2022, one of the most trusted-looking exchanges in crypto collapsed in about a week. The detail that mattered most to customers: an exchange that had been marketed as safe and well-capitalized had been using customer funds in ways customers had no idea about. The CEO went to prison. Customers waited through a long bankruptcy. The label 'reputable' had been an opinion, not a fact.

How do you size around this without abandoning exchanges? Three working rules. One — never hold long-term wealth on an exchange. Trading capital and an active float are fine; the long-term stack lives in self-custody. Two — spread across multiple reputable venues if you trade actively, so no single failure takes out your operation. Three — know what each exchange publishes about reserves and audits, and notice when those communications go silent. The exchanges that failed almost always stopped talking clearly before they stopped paying.

Recap: exchange failure is not a tail risk in crypto, it's a recurring event. Trade on exchanges, store long-term holdings off them, and don't trust a brand to be a guarantee.