[Astrohacker]

Krugman prefers the dollar, which has a supply that is constantly inflated by the central bank. But if the dollar is so good, why do people have to be forced to use it? (You have to pay your taxes in dollars, and you have to accept payments for debt in the form of dollars.) And how come bitcoin adoption has radically grown even though no one is forced to use it?

[scott_s]

The dollar is so good because people are forced to use it. It's the currency of the land, which is enforced by the government. Hence, people use it.

That bitcoin adoption has grown significantly does not necessarily mean it will remain as a viable currency in the future.