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There’s a saying in crypto: not your keys, not your coins. It’s typically a warning that it’s safer to keep your crypto in an offline wallet that’s harder to attack than an online exchange where you don’t have control over the keys to the wallet housing the funds.

So far, however, the complexity of learning how to self-secure and custody crypto has been prohibitive to many prospective crypto investors, which has allowed exchanges like Coinbase

and Gemini Space Station

– two of the earliest in the game – to thrive.