Most newbies have the problem that they don't understand the dynamics of the markets and what it will do emotionally to them. When you take a small amount and play around with it in the crypto market, maybe even gamble on less known coins, you get a better feeling of how quick things can develop badly for you and destroy your investment. If you start out big right away there is hardly any chance you will be able to handle the situation neither emotionally nor technically. You just don't know what to do if shit hits the fan.
If you don't have any skill about your money, risk and emotion management, then trading is not for you. your trading bot/experience can tell you when you should buy, where & how you should trade but they didn't teach you money, risk and emotion management.
when market gives bearish signal skilled traders fix their profit and wait for new buying opportunities but newbies ignore that and follow their imotions.
Most of the new comers don't have any trading plan, they are following hype and get caught.
Nowadays leverage is most popular, and newcomer are doing rush to do leverage trading but you should know leverage trading is not for newbies, many skilled traders are faild to manage their leverage trading.