Just hold your balls and try to do not sell anything, you wrote this thread more than ten days ago and the market could not be compared to the actual one, it is super bearish right now. Let's see how it goes, maybe everything will recover soon.
I have won a lot in the past months
BTCBut in the last month I suffered heavy losses

What do my trading friends tell me to go beyond this difficult period?
If you saw that the profit was not their in trading then why you sell all your coins and turn you to lose, day trading is very risky why you should not try to invest in long term not even a week or a months or just it takes a year to have a huge profit. Here's some tip if you want then if not don't mine, divided by you capital fund into two let say 50% of investing solid coin in a long run and the rest 50% for day trading. In this case you can avoid from loosing all of your money. So, if you lose just move on there's nothing you can do and make a new day start of trading.