There is no way to avoid loss in the trading. Sometimes you have to lose your capital here. It is not possible to get profit always. But it is true that we have to know the right time when we should buy and withdraw our money to get profit. There is an another strategy that we should remember that it is not right decision to make huge profit from a single trade.
Whenever we talk about a valuable investment asset, we must realize that there is always a risk involved. Low or high risk depends on how we minimize it with good asset choices and how we have risk management.
Of course it will be difficult for anyone to avoid losses because crypto prices are very volatile, but again as I said that we can have ways to minimize it. The right way is when you realize that only money you can afford to lose you can invest, meaning from the start you understand how we have control over trading psychology.