When you want to buy something in a grocery store that does not accept bitcoin and does not even know what it is, what do your "full measures" consist of, exactly??   Forcing the marchand to accept your bitcoins anyway?  With a gun or something?

This is silly.   Bitcoin is about monetary freedom so if you like the idea you must accept that a lot of people will NOT know about your currency and/or will NOT accept it.   Hence it makes sense to have bridges between different currencies.   A bitcoin-friendly bank would be a very efficient way of accomplishing this.