But why would people use it at all? unless you are in a situation in which you are FORCED to use it (like in Venezuela or whatever) then chances are you will not care less about using fiat to do your daily shopping with bitcoin instead of fiat. People in general don't care, if they government works, they will not look for alternatives.

And the fact that bitcoin can go up 100x in the next 10 years, also guarantees if people have some bitcoins, they will just hold it long term waiting for it to go up, instead of "using it", whatever definition of "using it" you have (I assume you mean buying goods and services with it)