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Compare that with Schwab, which launched with only BTC and ETH, a 0.75% fee per trade, and no moving coins in or out at launch. So at most big banks you're basically just buying price exposure, while here you can send the coins to your own wallet.
In my opinion, Schwab is the more prudent company; they don't expose clients to excessive risk. A wider variety of altcoins would mean more backend work, especially given that the crypto space seems to have lost public trust recently due to security protocol failures on several platforms.
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Do you think bigger banks will have to allow withdrawals to self-custody at some point, or will closed-loop stay the norm?
To be honest, users don't need to deposit money into a bank; there is no valid reason for it.