I was making the assumption that the entity wants to kill the coin. Doing a 51% attack out of greed makes no sense as it'd be immediately self defeating, at least on a mainstay coin.
There are numerous different hashes with varying levels of ASIC 'resistance' - yeah it's a cat and mouse game, but hardly a major issue. The 'obvious' successor would be a matter of the unpredictable public as I'm certain numerous entities would vie to become e.g. Bitcoin 2.0. In the end the market would decide which was the winner. The great thing about it all being that the users could actually come out net winners in the end as the successors would likely not only be technical superior, but it would also be able to use the exact same ledger (as with Bitcoin cash for instance) so that you start with the same relative share in it as you did with the original.
In a way it would even be a good thing as Bitcoin itself is increasingly dated technologically, but is dominant because of its market positioning - which makes it difficult to change. If its market positioning was damaged, we could see the rise of an improved successor.
There are numerous different hashes with varying levels of ASIC 'resistance' - yeah it's a cat and mouse game, but hardly a major issue. The 'obvious' successor would be a matter of the unpredictable public as I'm certain numerous entities would vie to become e.g. Bitcoin 2.0. In the end the market would decide which was the winner. The great thing about it all being that the users could actually come out net winners in the end as the successors would likely not only be technical superior, but it would also be able to use the exact same ledger (as with Bitcoin cash for instance) so that you start with the same relative share in it as you did with the original.
In a way it would even be a good thing as Bitcoin itself is increasingly dated technologically, but is dominant because of its market positioning - which makes it difficult to change. If its market positioning was damaged, we could see the rise of an improved successor.