And more importantly it would be a mess coordinating the change in all the exchanges and... now that Bitcoin it is so mainstream how to explain the MSM that Bitcoin has gone from $17000 to $17?
A mess.... even an almost unknown coin such as Byteball, which would greatly benefit of that change, would have difficulties doing it. Bitcoin? Forget it.
We can keep doing forks as some sort of stock split though

It's staggeringly too late now. It should've happened in 2009 after a bit of thinking about where it might head once it was up and actually running and about thirty people needed persuading.