I'm so stupid when attending crypto currency, who can help me to get money back? I also ask many traders who has experiences in this one, but I still lost money
You haven't lost anything until you sell. Hopefully you're in a position where you don't need to sell in order to live, in which case just ride out this down trend and you'll be back in the green soon. It's just the cycle - market goes down, market goes back up bigger and better. The market will reach new all time highs this year and we'll be laughing all the way to the bank!