There is not one (1) example of how to fill in a FBAR entry for one’s personal cryptocurrency wallet in the entire world.
[2018/1/29 update Because maybe it’s not needed!]
I challenge you the reader to show me how to properly enter it.
Account number: wallet address(s)?
Financial Institution: Me?
Address of Financial Institution: My address?
Yes I am in a foreign country right now so so must be my wallet.