I'd spend it.

I love the designs, and the Bill of rights on the back, but where's the Second Amendment? Can we reintroduce the $500 bill and use that on the back? Put Alexander Hamilton on the bill for ironic purposes.
I'm holding out for one and two dollar coins. Canada totally corrupted me on this.
Edit The first and second amendments are on the $5. I still think the Second Amendment deserves it's own bill.
no subject
US $1 coins have the same purchasing power, more or less, that a quarter had in 1975. My experience with Canada was that having a $1 and $2 coin rather than a bill was not a particular hardship, nor did it lead to a massive number of coins in my pocket.
The Japanese equivalent is the 100-yen coin, and there we were warned to accumulate them when possible, because so many vending machines took them and wouldn't take bills.