People see crypto prices go up. They get all excited and buy. Then crypto goes down. People face two threats that they need to overcome:
1. The threat that they were wrong to buy and so they might be wrong to sell;
2. The threat that crypto has gone back up in the past, and they might miss out if it goes up again.
The successful crypto traders are those who don't have fear... or at least not much of it. Many of these people are successful at Forex trading, as well.
Best advice for any investing is, when you realize great profits, before the price goes down, take your profits. At least take your investment out.
If you were wrong by investing, will you be wrong to take small losses? Or will you be far more wrong if you take greater losses? Early in the loss period, take your small losses and go. If things change, and the price goes back up, get back in at a later date.
Right now is a good time to get out of crypto. Why? It doesn't look like it will go up soon. Take your losses and get out... but keep watching. When it starts to go up, and the trend becomes strong, then get back in.
If you don't have the money to play with in the first place, don't get into something as volatile as cryptos can be... at least not for investing.