You did the math without taking into an important factor. Networth ≠ Liquid cash. 
You see their networth is coming from stocks, bonds, investment on many things and their valuation, gold and simply any asset. So if you see someone valued at 10 billion that doesn't mean they can free up 10 billion and just buy bitcoin with it.
And if they try to liquid some of their asset like their company share of 10% that just crash their total valuation.
You see their networth is coming from stocks, bonds, investment on many things and their valuation, gold and simply any asset. So if you see someone valued at 10 billion that doesn't mean they can free up 10 billion and just buy bitcoin with it.And if they try to liquid some of their asset like their company share of 10% that just crash their total valuation.
Yeah it would, liquid cash is a good point too. These billionaires have their money tied up in so many places. I do think bitcoin will eventually hit 1 million, I really do. It has everything going for it right now I can't see how it can't continue to rise at an unbelievable rate. Bitcoin has a funny way of making people regret not buying it and that's also why you don't see a ton of people who own bitcoin lining up to sell it unless they have to. I think most bitcoiners want to see how it's going to play out and so they will gladly hold onto their coins for as long as they can, they don't want to miss out and they don't want to decrease their exposure unless they are trading or getting into other crypto projects or non related crypto projects they see their capital being put to use elsewhere and cashing out of it.