On rare occasions, when I was trading. It is an unpredictable market, as they say. But over time you learn how to make better movements. It is important to be always up to date with the news and development of the crypto projects.
Well most cases of lost bitcoin are made by gambling and trading. Some hacking too. But we can avoid this stuff by first,learning how to trade. Don't just jump in to trading without knowing the basics. Second avoid gambling, it is more likely that you will lose your BTC and tighten your account security.