You are saying this because of the present situation of bitcoin is misarable but don't forget there are a large number of people who are still grabing the opportunity to buy bitcoin in low price so, 500$ will never happen.
It is not $500 but OP is talking about $5000.
I think billionaires are probably looking at safer things to place their money in than Bitcoin. The billionaires that are involved with Bitcoin are probably people that got in early on.
I don't see how you can assume the price can't go lower than $5000. It easily could dip lower and never come back up by people selling and not thinking it will ever go up.
Yes, I do agree because in market anything can happen. This market can't run only by whales manipulation. If I'm not wrong, currently many small investors also holding a large percentage of bitcoins. At this time if some bad news comes out about the crypto market then in a panic all small investors start selling then whales can't hold the price at $5000.