I think these big names won't do any good for the cryptocurrency world. These super rich already own banks and other financial institutions, which suck common people and when they will enter the virtual currency market, they will also establish there hegemony there. Everyone should understand that cryptocurrencies and decentralized public ledgers are beneficial till no one controls them. When these things will come under some powerful people's control, they will become the tool of invincible slavery for common people.