Is it possible multiply by the number of coins you have? Obviously it don't make sense to tax those 1 billion cents at the same rate as those with 1 trillion or more.
That would also be unfair? you get charged more just because you have more?
I think that's called socialism.
I agree that a fair flat tax is best, and I'm nowhere close to a trillion, even if I'm lucky and some of the coins I transferred vest at the 10X rate.
We shouldn't punish those who had better vision or took on more risk. A flat tax is fair enough for everyone and will help accomplish the intended goal.