I don’t think I’d like it - if my agency asked me no questions at all, and told me to accept pay in bitcoin.
Better you have a working relationship based on you know things about them and they know enough about you to give you that better job you’d probablly otherwise get passed over for elsewhere…
I posted a CV on line just under a year back, and although 90% of the replies were from chancers trying to get me to work officially for crap pay, or offered me the sky for a dubious-sounding “behind the bike sheds” deal - I only needed just the one proper, and bona-fide reply to rescue me from the utter perdition that was lockdown without pay I endured the year previously, forced to take a £12ph job and all…