You don't think Buffett learns at his age? He bought BYD, AAPL and BABA in his 80's and 90's. There is no limit or age that restricts a person's ability to learn.
I also don't understand this compulsive lie that is perpetuated about Prem not changing his ways or learning. As you stated, he's a self-made billionaire, who continues to make money...what exactly do you expect of him...to walk on water?!
Frickin' morons on here who are sitting on net worths of a few million dollars at best (yes, I'm shitting on my own audience) espousing how a self-made billionaire needs to get his shit together! Yes, bring on the younger and hungrier jackasses who think they can make money consistently over a five year record instead of a lifetime. Cheers!