> I'm not saying it's good or bad: I'm just saying that people leaving coins or USDC or USD on Coinbase are very far from "running their own bank".

Exactly. That's a big 'no thanks, and no deal' as it defeats the whole purpose if one leaves all their coins on an exchange for 'long term' holding.

Nothing wrong with downloading a crypto wallet app and sending and storing the USDC, USDP stablecoins on there. No need for Coinbase.

Job done. Your keys and your coins without the volatility.