Sounds familiar. Is he a member here?
I know it's common among libertarians and American Jeffersonians, but it's a strange thing to double down on for a person that otherwise questions everything. Actually not even that, but refusing to even have a discussion about that is what I find dubious.
If we can agree on a Christian worldview, then everything else in politics is just a matter of "how are these values manifested best politically?", which is clearly an inductive process that happens over time, and has to be debated somewhat openly.
I used to buy into fixed standard crap, until I was introduced to pre-WWII economic thought and history. I never felt married to those theories.
A Christian shouldn't feel absolutely tied to any ideology, no matter whether it's Austrian Economics or Classical Liberalism, or Fascism, or whatever.
The BTC craze is insane because as a currency, it doesn't even solve issues of government overreach. I'm not an expert on crypto, but I think Monero would be closer to that standard. It's just become a hip means of speculation, and I think there's a solid case to be made for Christians maintaining a healthy distance from all things financial speculation to begin with.
It makes sense to at least have crypto, including BTC in your portfolio and everything, it's whatever. Dollar and Euro are devaluing, so you try to store value, and BTC seems to have gone well for some people.
But insisting upon anyone of those means of value storage is bizarre, especially if you choose to die on the BTC-hill. No honest person can say that they fully understand the dynamics of the BTC exchange rate.
Whatever, I don't know his reasons for it. Maybe he got attacked for it early on and then became defensive about it. But then I don't get why you would not be interested in reading about economics and verify it before you burn bridges over it. If it's important enough for you to get emotional, then it should be important enough for you to question it to some degree.