It is a very bad practice and it can cost him a lot going on. You should set limits for yourself and not try to use others as your yardsticks because you don’t know their state of capabilities which cannot be compared to yours. This people may be able to recoup back immediately when they face a liquidation more than 10x whereas you may not be able to face same. This is not something you should think about looking up to a mentor, you should look up to one in a positive mindset, like those that will limit their betting and has a time to stop. Gambling having a point of stopping is very important because when it gets too excessive, it becomes very hard to stop at that time and would have caused a lot of damage that time.