Sure he can try, but he won't have 73M + Exchanges to work with.
That is a fundamental difference. There is no way to get an off-chain deal for that ridiculous amount of power anymore and there is no way to buy it on-chain / on exchanges. Anyone would run out of money on the way there, or be invested so deep in the end, that he/she is rightfully very powerful. HIVE would be way beyond 10 bucks by then...
The mingle in of the exchanges, that was though and though illegal behavior. Unbelievable that it actually happened. I bet my ass there was black money involved. Not on CEO level, but on some administrative level. There was someone to log in and push the PowerUp Button.