No, trading isn't a dangerous profession. Don't see it that way. The only way someone could become rich today from trading and then poor tomorrow from it is if they became over confident from their winning and then jettison their trading strategy and plan. The market has a way of disciplining traders like that. It doesn't like traders getting over confident. Every trader should learn how to stay down and humble while winning. It helps take off pressure and impatience from them.
The problem with trading is uncertainty is much so were there is uncertainty there is risk so there is enough reasons why a lot of caution needs to be taking there two things involved when it comes to trading because it is always a give and take situations so when it comes to trading understanding matters a lot and this is why knowledge is very important in all circumstances especially when it comes to trading it as to be properly understood before you can proceed and starting from the beginning level to the professional level and the more you trade the more you gain more experience.