I am not sure that long-term investments will bring the expected profit. In my opinion, not long-term investments and trading are now promising.
Yes, but many traders lose more than they earn. To be honest, it is not easy to trade on the cryptocurrency market for profit.
I don't know any traders who would trade manually, they have been using trading bots for a long time, but it's not as easy as it seems, you still need to choose the right strategy.