Heh I bought at $20 and sold at $1000. It was only 1 BTC. I bought I think 2 or 3 and mined a bit too but back then exchanges got hacked all the time. Honestly I do not feel bad. Every pizza I bought could have been tens of thousands too if I knew how BTC would turn out (or Nvidia or Netflix or the outcome of any major sporting event, etc.). I made a profit and it helped at the time. I am not sore about it because I also do not know how many dumb investments I passed up that would have just lost money.