Investment success has nothing related to your investment capital like whether it is big or small.
I think you are a little bit lost in your proclamation, if investment capital weather big or small does not have anything to do with your success then what else will determine your success. As far as I know the capital invested in Bitcoin either big or small constantly is the reason why Bitcoin portfolio increase overtime couple with volatility. What else do you want to explain?
Only one thing can make investment to be successful and that's money, so without money there will no be investment, talk more successful, so since @Catenaccio think otherwise he should remember how and what he use to have the investment he has and also how not possible it would have been without it. Big money make a faster investment while smaller money follows step to step movement, so actually @Pi-network314159 you are right of Catenaccio being lost from what he is saying but however is good he stated it so that he will learn and no that money is the investment and not the absence of it as he is thinking.