I put about 10kUSD into a company called DPW that just opened a bitcoin mining operation when bitcoin was flying. I made the biggest rookie mistake and chased a stock that was shooting up. I bought at $5 a share. It quickly plummeted, and to make matters worse, they immediately started diluting the stock. It's at .40 now and it's so low it's not even worth selling at a loss. I'm just stuck holding the bags and hoping it goes back up someday.