This is a bad necessary condition for considering something a currency.
I definitely cannot pay my taxes in USD. Does that mean USD is not a currency?
Or did you mean that you have to be able to pay taxes with it somewhere? So, hypothetically, if someone founded a microstate which allowed paying taxes in Bitcoin, then it would become a currency? But that seems ridiculous given that it would have exactly zero impact on me unless I moved there so I don't think you meant that.
As a matter of fact, I often (read: most of the time) cannot buy things using USD in my country. Yet I am a holder of USD and spend it when buying things in my country quite often. How so? Well, I sell the USD in exchange for my country's currency at the point of sale, just like Bitcoin.
> This is a bad necessary condition for considering something a currency.
On the contrary!
'Money' is just IOU notes. What gives these IOU notes value is that governments use them for paying welfare and civil servant salaries, and in turn take them back when collecting taxes.
> So, hypothetically, if someone founded a microstate which allowed paying taxes in Bitcoin, then it would become a currency?
Yes. But with a caveat: the wealth of a government's welfare/civil servant class and the threat of its tax collectors is what gives currency value. The blockchain here is entirely superfluous, this hypothetical currency would be just as valuable regardless of whether a cryptocurrency scheme is used.
So then the various cryptocurrencies fit the bill because a lot of people are willing to treat them as IOU notes among themselves.
> What gives these IOU notes value is that governments use them for paying welfare and civil servant salaries, and in turn take them back when collecting taxes.
But if some people are willing to treat a cryptocurrency as IOU notes, then that cryptocurrency is exchangeable for a currency like USD, EUR, etc, again allowing me to pay those taxes. This is no different than the case of me using USD to produce money for paying taxes to my own country which doesn't acknowledge USD, which you haven't addressed.
> Yes. But with a caveat: the wealth of a government's welfare/civil servant class and the threat of its tax collectors is what gives currency value.
I disagree. I agree with your initial point, though: money is just IOU notes. As long as there is someone willing to buy those IOU notes off of you, it's valuable.
This is a bad necessary condition for considering something a currency.
I definitely cannot pay my taxes in USD. Does that mean USD is not a currency?
Or did you mean that you have to be able to pay taxes with it somewhere? So, hypothetically, if someone founded a microstate which allowed paying taxes in Bitcoin, then it would become a currency? But that seems ridiculous given that it would have exactly zero impact on me unless I moved there so I don't think you meant that.
As a matter of fact, I often (read: most of the time) cannot buy things using USD in my country. Yet I am a holder of USD and spend it when buying things in my country quite often. How so? Well, I sell the USD in exchange for my country's currency at the point of sale, just like Bitcoin.