It is good point and advise for new traders. However, market volatility seen in 2018 is actual market behaviour that could always happen. We should all use this market moves to learn something new and make some strategies how to trade in relatively “unusual” market conditions.
I believe that you need to remain grounded in your life. This is my philosophy that the character of a person is shown when he faces some success in his life. You need to remember that a rainy day is just round the corner. So, be humble and keep your senses intact.