Another dollar-coin misadventure? The Presidential dollars and the Sacajewea dollar and the Susan B. Anthony dollar and the Roosevelt dollar and all the others didn't get the message across yet? America does not want a dollar coin. Full stop. Maybe it saves $4.4 billion over 30 years. That's $146.67 million a year. Americans may be loath to spend tax dollars for things, but if 25 guys in Los Angeles Angels uniforms can be paid $154 million this year, I'm pretty sure 311 million people will, on the whole, be willing to hand over 47 cents a year so they can not have a bunch of extra bulk in their wallets.
Criminy. You take the money you spend trying to promote this again and again and again and put it towards something else, there's some of your savings right there.