bets as is common in a stable diversification of risk. Yes, I agree the applicability of FDIC concern is real.
The other aspect is banks being able to learn to figure how bitcoin really operates within the market. Can't learn unless ya/the bank gets involved.
I don't see any of it a threat; structurally, obviously, way too loose and unconventional and open to hype, inflation, loss etc. Financial instruments and currency need some semblance of stability.