Last week banks needed to open to serve thousands of pensioners who don't have debit cards and don't know how to use an ATM. How do you think people like this will go with concepts such as 'blockchain', 'mining', 'where does a bitcoin come from?'
The adoption of bitcoin will be a gradual process, just like any technology. The fact that Granny doesn't use ATMs or debit cards doesn't mean the country's not ready for ATMs or debit cards. Likewise for bitcoin: you'll have early adopters, mid adopters, late adopters, and never-adopters. It will be a parallel currency (not the ONLY currency) so it's OK that not everyone will use it.
Yes, bitcoin should never aim to be a monopoly on money, it should be freely competing with other forms of money, in open fair and free way. Last thing we want is governments forcing us to use bitcoin, it would be an unmitigated disaster. People will resist going completely electronic especially if it is forced on them, including some bitcoin diehards like me. There will always be room for the oldest forms of money, such as physical silver coins which are extremely depressed in value right now but one day may also roam free to find fair value as money.
