The biggest mistake investors can make that risks them blowing up is concentration, especially coupled with debt/leverage.  One would think that, at the time, a top 10 world’s richest man would learn some of those lessons, but below is a must read on how not to invest.  Especially once you have some money.

Lots of “smart money” lost a ton investing alongside Francisco d’Aconia, err, I mean Eike Batista.

How Brazil’s Richest Man Lost $34.5 Billion