If you're doing to a FA, I think you're already pretty much not concerned with privacy or you're open to doxing that stack and letting governments know you own it so I guess how to use it most tax efficiently would be important.

I think a big one is also inheritance planning, and what to do in case of divorce or moving overseas with your wealth.

I also think that in the future there will be more bitcoin equities/bonds and other financial instruments that might be attractive to these people and that should be a talk/product on its own. Might not be important now with bitcoins upside but as vol comes down, it might be interesting to some to have an allocation of more risk

I do think FAs should let people know about non-kyc/private bitcoin and the importance of getting a stack that is not tied to your identity and how to acquire it and store it safely and not mixing it with your public stack