What is that for nonsense? Bitcoin for large players is pretty easily to manipulate considering how thin the markets are, where you also have to take into consideration that just 1 exchange is needed for that.

If you're able to move the market of a leading exchange, you'll be able to move the entire market as result of that. You shouldn't really pay attention to the market cap since it's only a statistical figure.

Don't forget that the market movers of back in the days have been growing alongside the market, which means that they have become more wealthy than ever before. It's as easy as always for them to achieve the same result.