for people like do kwon and sbf, and many others I probably don't know about, what you said
Banks are competing for deposits; this rate pressure is already hitting earnings. And they take maturity-transformation risk. PayPal has found ersatz depositors without depositor protections who will accept zero yield in a high-yield environment. They could literally just roll into Treasury bills and overnight funding and ink a decent profit.
Of course this probably won’t happen for regulatory reasons, and even if it does pyusd may have the same type of blacklisting that prevents many dapps from using usdc.
Paypal getting their cut from crypto market and spenders there... Maybe some crypto-users thinking that them trading for these coins and then using them to buy stuff is finally real world adoption...