I'm all for getting rid of the penny, but not so sure about the dimes and the dollar bill. Many vending machines take dollar bills but not dollar coins. To change them all over to coins only could be quite expensive, and result in the vending machine companies raising prices. Not everyone can afford to pay more. Some people who buy food from vending machines are buying the only food they get. Not only that, but I've had a handfull of dollar coins to drag around, and the weight is not negligible. The damage they do to pockets is really annoying.

If we eliminate the nickel and the penny at the same time, you can bet that prices will be rounded up to the nearest dime. That might not be a problem for many people, but there are plenty of folks for whom a difference of ten cents could be the difference between affording a needed item and not being able to afford it. The same goes for dollar bills. I doubt that many business are simply going to start handling a lot of dollar coins. They're much more likely to round everything up to the next five dollars.