Well, you see I once knew a friend which turned 0.1 btc into 130 btc. He was more accurate than me. And then just 1 trade screwed and he lost all his btc.
A similar thing happened to me. thats why I revised my risk management and now I do not risk more than 10% per trade. I am working on recovering, and trading for others would help.
Trust me, If I did not get liquidated I'd be flying jets right now. If you guys want to see my accuracy or give you guys signals just PM me on telegram @borislavfx
Then your friend is too greedy and never feel enough for what he can get. If I were him after I can turn 0.1 btc into 130 btc, I quit from trading, take a break for a long time and cash out the money. Never trading again or if I want to trade, I only use 0.1 btc - 1 btc so I can save the rest of bitcoin in the wallet.
Being greedy and naive in the trading will cause ourselves to become worst, and your friend is the sample.
If you are a good trader, I suggest you trade for yourself, and that is what I will do if I am a good trader too. I am too afraid to use other people's money to trade even if I am a pro trader because we don't know if our plan will always work or not. Besides that, the market will always change from time to time so we cannot always make the right prediction. But that is only a suggestion for you, and I hope you understand.