$ = $10

[Gabu]

I've actually said the same thing regarding the penny.  As it is right now pennies are basically nothing but loose change that take up space in your wallet and that you occasionally unload in a purchase when you have something like forty of them built up.  I'm not sure about the resolution method (the one I personally thought of would be to just round every price to the nearest multiple of five and then have people trade in pennies for nickels if they want), but I do agree that the penny is pretty much useless now.

[Gabu]

It's not just that. Even dimes aren't worth much.

Under this, a dime would be worth a (current) dollar, for use in soda machines. A quarter would be $2.50.

True.  I didn't actually understand what you were talking about until I read it again; now that I do understand it I think it's a good idea.

[Gabu]

Just look at the repeated failure of the dollar coin to catch on.

It's worked fine in Canada.