The creator of the Ethereum crypto currency, Vitalik Buterin, admitted that the April 1 proposal to improve the EIP 960 protocol was in fact a joke.
Buterin expressed his readiness to implement the proposal, if the community deems the restriction of emissions necessary.
If the community wants fixed supply and people believe that EIP 960 is a good way to achieve that, then it should adopt the proposal. If the community does not, then it should not. This is true regardless of whether or not the original intent was in jest.
According to Vitalik, most of the community did not notice another April Fool's joke, which was hidden in the message about the establishment of the official stable crypto currency on the basis of Ethereum.