What evidence do you have that the guy who bought your card stole your btc? Your computer could be hacked any time you were sleeping.
Would be an amazing coincidence.
My wallet is ALWAYS open. Since the day I got it ... it is always open.
All the sudden ... this guy comes over with his USB drive. Starts doing a bunch of stuff. Remoting in to his computer etc.
While I am in the kids room making sure they are not getting hurt while they are playing.
His daughter was jumping off my sons desk on to his bed. So I went in there to make sure they did not get hurt and stop the jumping.
6 hours later ... my BTC are missing.
So to think my computer was hacked from the time that guy left to 6 hours later ... is a long, long, long shot. Like, LONG shot.
Come on man lol it's pretty clear what happened here.