It is well known that Warren Buffett is against diversification and it is not difficult to understand why, diversification it is not really a tactic that you can use to make money in the market, it is a technique to avoid losing money in the markets, and even if he has said many times that he is the kind of person that likes to get rich slow this is done by concentrating his capital in just a few investments, and this requires knowledge since even just a few mistakes can be enough to make you lose a lot of money.