It's time to revalue coins to 10x their current face value.
No need to abolish the penny. That would be quickly followed be a push to abolish the nickel. But our use of a 25c piece, instead of the 20c piece that most other systems use, complicates making change in the absence of a 5c piece. And if we only remove small coins then we will eventually stop using coils all together if we don't also add new higher value coins. But logically, that coins should be larger than the existing ones they'd be joining. So coins will get humongous.
Just revalue the current ones. There is only about $2B in specie in circulation. So injecting $18B in value by decreeing their value to be 10x current would have negligible inflation value. It would just have to be done suddenly and after secret planning so people don't all horde coins before it happens.
I've been waiting a long time to spit out this rant.