The EU is a common market in a similar way to how the US is a federation of states.

Bitcoin is not an economy. It is a monetary system at best.

Bitcoin is similar to gold, which surely you can see is not an economy?

Bitcoin and gold are not economies- they are tokens and stores of value- nothing more- certainly not functioning economies with the rule of law and diversity of goods and services an economy must have to function.

Even if there are some small examples of Bitcoin based economies such as in El Salvador, they still have governments, citizens and businesses, taxes and land titles, roads and infrastructure and laws governed by the government, not by Bitcoin.

A monetary system is part of an economy- the MoE enabling exchange of goods and services- it is not and cannot be an economy in of itself.