Yes, it's true that friends besides trust, someone who is already good at reading situations, buying bitcoin or altcoin does not have to wait when prices fall because at high prices they can still look for profits, a little profit from repeating, if compared at low prices and sell at high prices despite having to wait long.
it is only for those who are experienced and have skills in trading and investing. because predicting the ability of the market in the future is very difficult. especially for some assets that may have to have more skills in analyzing the project.