There are many people who still don't know about bitcoin or other cryptocurrencies. I don't know about others I am talking about my country and about my society. Whenever I ask from people about or talk about the Bitcoin. They ask what is this?
How much there is who face this problem?
There are many people who are 50+ who will only have heard about vague references to Bitcoin in the news and will never know anything about it. They will never need to use it in their lifetime, especially as it has become more like a commodity rather than a functional token used to buy stuff. It is probably for the best because they will be much more susceptible to losing money in things like scams or fake adverts.