Custody: how institutions store crypto and why not like you

For a pension fund, buying bitcoin is not enough - it must be stored in a way that satisfies the regulator, the auditor, and the insurer. Thus grew the institutional custody industry.

How storage is built

• Qualified custodians: licensed companies (trust banks, specialized custody firms) legally liable for client assets. These are what the ETFs use.
• Technology: cold storage with geographically distributed keys, MPC (the key is split between parties and never exists whole anywhere), HSM modules, multisig with corporate policies.
• Processes: a withdrawal is not a button but a procedure: limits, multiple approvals, timelocks, insurance policies.

Why it matters to the market

Concentration: a handful of custodians hold the assets of most ETFs and funds - a new type of systemic risk, "too big to be hacked". A precedent of such a player failing or being breached is a tail risk for the entire asset class. On the other hand, mature custody is the reason big money came at all: without it there would be no ETFs and no corporate treasuries.

For the individual holder the lesson is inverted: you do not have their insurance, but you have their unattainable advantage - self-custody without a counterparty. Use it wisely.