I think your right. A billionaire would have the capitol to invest one million dollars in Steemit and the resulting Steempower would turn his upvote into a veritable money printing machine. But I don't know if there are any billionaires in crypto, millionaires surely, but billionaires not so sure. But the concept is still valid if it's a millionaire and seeing how Steem is at a low, its attractive from a buy low sell high stand point.
I hope to keep buying Steem at this price, but also hope your right that such an investment will ultimately raise the price of Steem and increase the value of my rewards.