I believe that the majority of us don't expect Bitcoin to become a future currency, nor are we planning to use it in our daily lives. Let's be honest here: it doesn't make too much sense to be used in that way; it's volatile and extremely valuable. Why would someone pay with Bitcoin and not a fiat currency that constantly depreciates in value? Nowadays, Bitcoin is considered an asset, similar to gold. Would you pay with gold in your daily life? Probably not. Thus, I don't see any practical reason to use it in our daily lives, unless it's for speculative purposes.
You are describing the Gresham law, when there are two different currencies in circulation the most valuable will eventually be hoarded while the less valuable will be widely used, however this only takes into account a scenario in which both fiat and bitcoin are in place at the same time, if inflation keeps growing, a point could be reached in which fiat could not buy much anymore, and that is when people will look for alternatives and gold and bitcoin could become widely used as currencies at the time.