Winklevoss brothers invested $11 million when 1 bitcoin is amounted to around $120. An now it soared to over $10,000, that investment could be something.
Big risk and yet profitable those people believes on bitcoin when everybody was in doubt, they really deserve that money and for sure they will become more wealthy in the future. But still I suggest to pull out some of it because your own government may not allow you to convert it into fiat money, well who knows and for sure they know better than me.