I mean, I don't want to lose money either. But we can't say for sure when the best time to buy and sell is. Heck, if I knew when the best time to buy and sell is, I would be a billionaire by now.

The only thing you can do is pretty much decrease the risks. Never go all in, and don't buy at all-time-high or peak prices. There will always be risks when talking about investing, whether it'd be investing in crypto, or in stocks.