Lol sorry about your experience but its a bit funny. After Dan Larimer resigned from Eos, the market sentiment became very bearish, maybe if you had paid enough attention, you could have seen that.

But for Sandbox, honestly sometimes there's just no knowing....selling at the wrong time is a constant event for almost everyone here, I mean, you could have held and something would have happened and you might have lost more,.... ....best thing to do is shake it off, have a drink or two and carry on like its a normal day. Go find the next token with the potential to make you back the profit you lost.