bought bitcoin at the high a few years ago and sold on the way down, losing about $5K. Honestly, just a modest loss amidst a whole string of really good stock trades, so no big deal. Could have lost a lot more and waiting it out sure looked like a losing proposition at the time. Truth be told, it was just a big waste of time and that is frankly the biggest loss. It sucked - the wallet baloney, setting up accounts, trying to get my money out (it somehow got registered in my son's name), worrying about it all night since it trades 24x7. ALL OF IT!