Buffet is famous for saying that he doesn't invest in what he doesn't understand.

He simply doesn't understand this therefore he wouldn't invest.  His comments were off the cuff.

He has been investing and making billions since many of us were in diapers.

If he wanted to invest in bitcoin he would.  He would not launch a smear campaign against it watch it fall a couple of dollars and swoop in.

When he invests, he does so in billions.  He could purchase a substantial amount of coin, he could create mining conglomerates in Antarctica ...he could pretty much do whatever he likes.

He loves money.  He is good at making it.  He is a capitalist.  He is smarter in that vein than 99.999 people on this planet.  I don't personally care much about his personal reputation as its none of my business but when people buy what he buys or sells what he sells they make money.