But most people don't always use the amount of money they can afford to lose, many of them use their savings for investment, either to buy BTC or altcoins, hoping that the money they invest will make them rich in a short time, people like this usually buy on the basis of being affected by FOMO, which is the wrong mindset.
Invest or trade with money you can afford to lose, it's the big principle but even so, you must choose a safer or safest one, that is investment, not trading. If you start with all money you have for either investment or trading, you can be very uncertain, fearful, emotional reactive in this market, and can do many bad decisions which in the end result in loss, not profit.
They don't have a good trading plan, strategy, money management, often don't even do research on the token they want to buy, just think profit and profit, until finally when the market corrects they get emotional and think this is a scam, I often see people like this, lol.
In trading, with its very high risk by the market volatility and perhaps liquidations if you use futures and leverage tradings, don't forget to use
one of best weapons in trading, stop loss order.
Leverage and futures tradings are not recommended, because it is more dangerous than spot trading. While trading in general is risky too and it's worse than investment.