Here are the reasons why;
1. It is quite stressful - old traders will soon give up due to mental health problems
Honestly, anything someone is doing, there will be a time when they will not have much strength to do it anymore. So as for trading, it is not an easy task; it is really stressful, and because it involves serious thinking and requires some time to do research, anybody with health challenges will hardly continue trading.
2. It is not enjoyable anymore - nobody will stay long in a job that they no longer find themselves comfortable with especially if you are not earning well.
Despite the fact that trading is very difficult, there are some traders who are making a reasonable amount of money from trading always.When someone has a good foundation in trading and it knowledgeable about it, it will not be that stressful for them. There are people who always feel comfortable trading.
3. Trust issue due to Scam growth - traders never find it safe to use exchanges, even big exchanges.
The issue of trust is there, but the best thing is to always move your money from exchange especially after done with trading. Once you are not leaving big amount of funds in exchange there will be no problem. No exchange can be 70% trust but still there still good ones existing.