Banks usually have some dollar coins and if you ask they can get them.

But cash register drawers usually do not have a space for them, they’re relatively heavy, and people don’t use them because they don’t use them.

Vending machines famously went ham trying to use them which annoyed people.

It didn’t help that the old Susan B dollar coins were almost a quarter shape and size if you weren’t paying attention.

The dollar coin SHOULD be small, a bit bigger than a dime, imo.

Or just skip the dollar coin and go right to a three dollar coin.

Pennies are going away so cash drawers should start having room for $1 coins soon. I'm hopeful we'll start seeing them.

The toll booths in Massachusetts used to accept dollar coins.

My intuition is that if there’s no 2 dollar coin to go with it, there’s no way for it to gain practical traction.

In the US, change is already an annoying factor because sales tax is rarely included in eg, 4.99. So no one is jumping up and down to go from five slices of paper to five rattling coins.

>I'm not sure what stops the USA using dollar coins in circulation,

We have a dollar bill