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?
I think long term trading is much better than short term. In short term, you need to monitor the market every now and then unlike in long term trading, you don't care if the current market is high or low because you have a specific period and amount to sell your coins. I suggest that you switch from short term to long term trading.