If the American economy collapsed, what would happen to Bitcoin?

Say, for instance, I buy into Bitcoin. I have that Bitcoin on my own personal wallet (I’m not super versed in this so if I get something wrong I apologize, I’m trying to learn). The American economy collapses (Again, new to economics and am learning, not sure if this is even a viable reality, but as a hypothetical) and the U.S. dollar becomes worth jack shit.

Would my Bitcoin still be worth something? Would I still have buying power for goods etc., at places that accept it?

From what I understand, that’s one of the points of the decentralized aspect of it right? It’s an international currency in a way therefore a singular economy wouldn’t have a devastating impact on its valuation?