Maybe sooner those billionaires will invest in BTC, once the BTC gain more popularity, stability and legalization.
for now I heard few names are showing interest in BTC, but I believe billionaire in this planet are starting to be curious and studying what is BTC business all about.

It's not the first time I've met, Well, well, the oligarchs have some capital in the crypto currency. And This suggests that this area has good prospects. Although I still have the opinion that very young people are investing their money in Bitcoin just because Bitcoin gives anonymity and thus they are evading responsibility for non-payment of taxes.
More people want to use Bitcoin for this purpose will make the government want to ban Bitcoin soon. You must to know the government always want to make money from the taxes. If they can not do that when most people using Bitcoin, I do not think they still ignore it.