Let me give you a quick story we had with the OP.
His topic says 100btc locked but in telegram he said there is 600btc locked.
So I offered him to unlock his account by my method which is unknown for him for payment.
I never ask for strict offer but he offered me 90btc.
So far so good.
I explain him that he don't know me and he should not trust my word same as I don't know him and I don't trust his 90btc offer for that and we need to use escrow.
I repeat 3 time that I don't need a single cent upfront but only after and when he get unlocked off his account.
Soon as I mention "escrow" he called me scammer and that he have no time for "that"  ( he don't have turning back his 600btc and being legit to put his offer for the unlocking service in escrow?).
I consider the OP as fraudster/scammer or that's just a setup story...
I mean... Which legit guy would refuse to unlock his 600btc without paying even 1 cent upfront but put his offer for the service in escrow so he can't lie and run away soon as his account get unlocked?
I can post public the telegram conversation with the guy if there is any doubts in my words...