“just made up” if you mean arbitrarily defined, sure. It’s not like a “bit” that has an irreducible objective definition.

However it does have a definition in whatever context you’re looking at and is very real, so I can’t really agree with your whole comment.

Yes the definition could be changed to jack up prices, but prices can also just be changed.

Dollars are “just made up” too and have varying value in different contexts to different parties. Are they “not real?” Would we hand wave away the entire financial section of the news and say bah, these “dollars” are fake anyway?