It would take many years to have high percentage of mass adoption and yet, there will be group of people that will never use bitcoin in their lives. Those who are living in remote areas that they don't care about the advancement of technology. They are already contented to what they have in everyday life. But those who are living in urban areas, you will get good percentage of adoption in the next coming years.
I agree, but fact is most people don't see, or rather said, understand the potential yet, I personally think that Bitcoin with its Blockchain is highly innovative, but many people of the "regular " kind don't see issues in banks and centralization, at least yet it is so, also, I don't think that the Bitcoin in its state now is ready to withstand challenges of mass adoption, eg transaction fees and transactions per second. I see other cryptocurrencies further ahead compared to bitcoin, but none of them are perfect and certainly not ready to be massadopted. Only time will tell at this point.