It would be better for WB in many ways other than his and his investors bottom-line-$-profits, to try and help his fellow Americans who are using and investing in Bitcoins, instead of only caring about himself and the investors in his Co's !
In general, why should a traditional multimillonaire investor care about bitcoin?
This is something new and untried, and a currency that not are recogniced by any country. Why should he even risk his name and reputation even to talk positive about it, or invest money in it. In general investors invest mostly in safe opportunities, they do due dilligence for months before deciding to invest. A true experienced establishedinvestor that have a honey pot take minimum risk ith his funds, if you are WB or other.
They let others take the risk, for example regards to start ups, in a later phase when its proven they buy in at "cheap" price ride the upcoming wave and sell on the right point. They have huge teams that do the due dilligence and investigate so WB and the owners have the correct info so they can take the right decision at any time regards to their experience.