I think this principle applies to business, or any kind of venture per se. As risks one takes get bigger and bigger, it would follow suit that the rewards, if such ventures would succeed, would be bigger as well. However, it's just a game of luck and courage so to speak, because as much as that principle or school of thought is true, what if the venture failed, it can also be a break point for one, especially if he is just starting up in one business. Same goes for the cryptocurrency market, as some have been successful for the risks they took, there are many more who have fallen down on their knees, some even quit, because this market is just too hard to deal with sometimes.