I think billionaires invest big amount in bitcoin, bitcoin has no fixed amount, it could get high or low, it could really affect the amount you invested in, but as time goes the price of bitcoin get higher and higher, also the money of the investor gets higher and higher
yes, now the bitcoin have take more interest of people and the rate is also going high with very fast rate and now when billionaires will start high investment in bitcoin the rate will get long jump and the bitcoin holder will become more and more happy and also through this step whole will be start working with bitcoin.