There will be two coins of 21mn supply after the fork. The money supply will be doubled. Some that prefer the 25% variant will be dumping on the 75ers. The opposite may not even work due to lack of exchange support, lol.
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Do you feel lucky?
I don't.
There has been a social engineering attack and it has been successful.
I thought it was Theymos who tried that. (And it failed, indeed.)
As for as I know, it was Core who tried to push us into centrally planning the block size, instead of letting market forces find an optimum. They (and their allies) did their best to obstruct consensus, but it seems that consensus is about to be reached after all.
Perhaps I'm technically ignorant. But I can tell when something starts to work badly. Apparently you can't. So either you don't use Bitcoin, or you are the ignorant one here.