Of course, the worst risk is losing money. That's why we always state that we must invest/trade with the amount of money that we afford to lose. It is a very common advice that we often saw/read in many discussions about Bitcoin investment/trading in this forum. Because investing or trading crypto is high risk, we are always expected to use safe money only.

Volatility is a risk, it can make people to suffer losses. But we must know that the volatility is also the reason why people can earn huge profits in crypto. The volatility enables the prices of crypto to increase very significantly. If crypto has no big volatility, we can't expect to see the prices skyrocket during the bullrun season.

Whatever is done excessively, there is always the potential to end badly. We must know when the right time to trade, we shouldn't force to trade if it is not in the ideal condition for trading. If we force ourselves to trade in a bad time, surely we potentially get losses. Anyway, having sufficient knowledge is a must for every trader. Trading isn't something easy, it can be very complicated sometimes. It is totally a bad idea to trader with lack of knowledge. Trading with lack of knowledge rises a bigger risk and chance for a loss. That's because he may not know what to do when he experiences the difficulty in trading. For me, trading with lack of knowledge is the same as gambling. It means we only try our luck in trading crypto.