I am a trader starting with 10BTC, and now I have 5BTC left.

Well that hurts..

did you start trade with btc or alt coin/token. .? I also started trade with btc and altcoin both 1 year ago and now i have literally nothing. Last year was really bad time for trade.

Hope upcoming years will be bring good news for us. There is some good projects are coming and hope they will rise up in the future.
Goodluck. Market uptrend, everyone can see crypto trading is easy. When the market goes down, everything becomes extremely difficult.