Well its true that investing with high capital will have high gains but also remember that its not only about how much you invest or you put into it but how you did it or what is the strategy that you use to have higher chances of profit rather than losses. I know some small time investors who were able to gain much because theyre able to master and fully understood how it really works. Though losses can still be present, its inevitable but at least you get to lessen the chance of incurring high losses. I think it still a matter of skills regardless of how much you invest on it.
Will be same for someone who take a lot of money to trading in cryptocurrency but he doesn't know how it can work. Just buy some coin once hype come and hold it for long term, but you may know some coins it could be useless in the future such as BSV although still has a value but sooner I think the price will drop drastically. If he buy such as coin with the large amount then he will loss a lot of money. So, it must balance when someone intend to come in cryptocurrency I mean in the side of knowledge he was know and also he has a lot of money to gain lots profit. Indeed, for some people who doesn't has a lot of money but he has a knowledge to predict the movement price he will get a rich from but for the long time to achieve it.