E.g. he just launched $STRC. This is a 9% APY monthly dividend fixed income product.

Basically you can hold this risk free in your brokerage account and just receive the interest, not much different than saving at a fiat bank.

Fiat banks could even offer their savers a 5% APY monthly interest by parking their money in $STRC, earning the spread.

So indirectly, MSTR is already a bank. You won't park your Bitcoin with Saylor, but your fiat.