I don't advocate diversification, I'm the only egg in my basket and I'm all in, concentration would be dual to diversification. If I was going to manage funds for a client , i would advise them not to concentrate all their funds on me however, so its all relative. I would feel real bad if i blew up someone else other than myself, although that would be really absurd. and that MS ceo guy doesnt know shit about trading, hes just plopping his fat pasty white ass on a stack of billions siphoning out as much as he can before he croaks from all the fumes in NYC and fucks off to the nantucket sound wherever guys who look like that go to compare their material possessions they traded for their bodies and minds. this begs the question though, why wouldnt i suggest a client invest 100% of their investable funds with me since percent ways im doing way better than anything they would have access to and have been doing so consistently for almost 4 years