They have lived most of their lives with out any dependence to computer. My grandfather finds it hard to use cellphone and facebook. I won't be surprised Warren Buffet is in that position with bitcoin.
Even though he didn't end up investing into bitcoins, It shows how a great investor and businessman that he is, He made the decision of not investing because he doesn't know anything about the technology. Most people will just jump into investing though they know nothing about it.