My first question would be: Do "best investors" actually exist? The title implies that some investors are better than others. But I have not yet seen any data driven argument in favor of this theory. There are so many investors on planet earth, that even if they all have the same ability to predict the future prices of stocks, some will do unbelievably better than others. By pure chance. The article starts with a pho…
Charles Schwab company did a survey of those of their customers who did very well over the long run, and they found a surprising attribute of a large number of the most successful investors: they had forgotten that they had the account. Buy and hold!
But yeah, this is the generalised advice; spread your investments, index funds, and wait. The market's trend over long term always goes up. It's just that it's more of a retirement plan than a get rich quick plan; people want or need money early in life, buy a house, be financially secure.
I think it was better for everyone back when, when the Simpsons started airing, where a single low education level income was enough to buy a house and support a whole family. That was wealth.