Are dollar coins worth a fortune?

Are dollar coins really worth a fortune, or is this just a myth? Some people claim that certain dollar coins can be worth a lot of money, but is there any truth to this? Could holding onto dollar coins for a while actually lead to a significant increase in their value? On the other hand, could it be that these coins are only worth their face value, and there's no real potential for profit? As a cryptocurrency and finance expert, what's your take on the matter? Are dollar coins worth collecting, or is it just a waste of time and money?