Immutability refers to data, not interpretation of data. It has a specific meaning in computer science. It does not mean "social value", or "economic utility",

Immutability refers to data, not interpretation of data. It has a specific meaning in computer science. It does not mean "social value", or "economic utility", or anything like that. It refers to the actual values of the bits. And in that sense, Bitcoin is unequivocally immutable. If you want to define some other term to refer to mutability of interpretation - go ahead. Just don't call it mutability.