While looking for a trading mentor, it is better you are careful because many people just want to be a mentor and not that they are actually making money from trading. The money they make is from people that are paying them or through other means.
Also trading is too much risky.
If someone has money, he can use it to advertise himself as a mentor but not actually making money from trading.
I think Trading is not as risky as you claim, because so many traders are doing very well except traders that are not experienced. Experienced they say, is the 'best teacher', and having a mentor in trading Crypto is good, at least, as a newbie, you need a highly experienced traders for mentorship.
Now having a mentor and applying your idea strategy is a plus for trading success, for example, Trader 'A', will take profits at certain profit/loss rate, say 1% increase, while Trader'B' will take profits/loss rate, say 2% increase. As a wise trader, you don't need to be greedy because the crypto market is volatile, and it can dump at any time. The market is very difficult to predict 100% correctly and it is very good to trade smartly.