[coinward]

If you have enough hash power to 51% attack Bitcoin at all, your potential for rewards by instead mining honestly are significantly higher, at least that's how the game theory generally plays out

[askvictor]

The other aspect is that, as someone approaches 51%, there is increased incentive for everyone else to prevent that from happening.

[naebother]

Bitcoins of mass destruction. Going to war over BTC control sounds absurd. But so does $50k a pop. So who knows.