Digital Asset Custody: Hot, Cold and Qualified Custody

You wake up to a message from your operations lead. A bridge key got popped overnight, funds drained, and support channels lighting up. You don’t use that bridge, but the question stings anyway: would your setup have survived the same hit?

Two weeks earlier, an exchange you considered for overflow balances shut down with withdrawals under manual review and a vague note about timing. Your board asks for a custody memo by Friday. It needs to be simple, practical, and hard to poke holes in.

That’s the job today: cut through the labels, map the trade-offs, and build a custody stack you can defend when something breaks at 3 a.m.

Custody is no longer a back-office box to tick. It’s front and center because the attack surface has grown and the rulebook is catching up. In July 2026, Europe’s markets regulator launched a coordinated review of crypto firms’ operational resilience with a specific focus on custody. The exercise runs into 2027 and ends with a public report. That’s a big signal: custody is where supervisors will push hardest next (European Securities and Markets Authority (ESMA) press release).

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