If we use Bitcoin at the grocery and people want it... ok. If we use it at the mall and people want it... ok. If we use it online or to shop online and people want it... ok.

Every time we 'use' it for these things... and people continue to 'want it' more than they want to 'spend it' the value goes up.

As the value 'goes up' the 'value' of the network increases to compete with gold, then bonds, then real estate then other things...

until it competes with them all.