Isn’t it awesome how secure the network is!
After all, if Bitcoin is going to become the global reserve currency a 51% attack should be absolutely impossible. Right now all the mining being done is rewarded with a measly ~$55 million per day. That's within the reach of some rich individuals to outspend, to say nothing of big businesses, hedge funds, or even nation states. I think spending about $1B a day on mining would be more appropriate in the long run.
Miners are motivated by profit. They won't necessarily even know that you're trying to do a 51%, just that you're buying hashrate and are willing to pay them more than they're getting elsewhere.
edit: In fact, you could run a legitimate mining pool at a small loss for a while to build trust. Participating in your loss leader mining pool would be attractive to miners since the other pools, that skim some profit for themselves to support their operations, can't compete on price with one willing to lose a little bit of money. If you want, break it out into 3 "different" pools that you control so that it even looks to the naive like there's no 51% control. Then spring your trap.
51%ing Bitcoin is well within the resources of a motivated hedge fund, major corporation, or country. The motivation just isn't there right now.
However the game theory behind what you are saying is completely nonsense, which is why no one ever did nor will do your technically and economically impossible stunt.
