🙂 If this account is in your name (sender = you) then I think yes. If sender is an exchange, then not. You can ask their support for the clarification, they used to be friendly.
Yes. I am not in crypto so I do not know how they check that stablecoins come from you and not from 3rd party.
As I︁ am not in crypto, I cannot say.
TBMK, they are transparent︃ re: fees; check their website. Generally, from what I recall, their fees are reasonable (taking︄ into account that it is a CH bank, not e.g. IBKR).