The financial markets and trading offer the ability to earn huge profits and huge losses, risk-management and a responsible approach making sure that you truly understand everything you are doing is key to success in this fun, exciting and potentially very rewarding industry. Spend your time researching and learning as much as you can, learn about risk-management and try to always see what other people cannot - all these things motivates and develop me to remain in the trading.
You made some good points but the problem he mentioned is a little different and its not about risk management but it is related to panic avoidance and how to remain calm when times are gloomy and portfolio is dropping like crazy in dollars.
I can relate this problem and this is one reason why I limited my trading because no matter how confident I feel about a token and even Bitcoin but once the price starts to topple I just cannot control myself and feel like its the end of the world. I know it will recover but instincts are strange and decisions are rather emotionally. So now I avoid trading unless I just feel good about bitcoin price and do leverage trading.