Yeah statement is quite logical to me because it doesn't matter you are re investing your money there will be a factor of risk present at every investment opportunity. All you have to do is to do your proper study before investing your money. Like if you follow the sequence when you made 10k profit at first investment and you thought you would made another tank a profit in another investment but that's a sequence that you should avoid.

What you should do is to do the same level of study that you have done when you are investing the first time and there is one more factor that investing and trading are two different things so if we are investing then we should have to wait for longer period of time and if we are trading we can see result in lesser time.

Ultimately risk factor and risk management are the main component of investing and trading that we should not avoid even if we made profit in the first try.