Despite how popular btc is, so many people still not interested in it. There will always be those who don't share the same interest as the btc enthusiasts.
Mass adoption is a gradual thing, most people and businesses already warming up with the idea of using btc unlike years back. I think satoshi dream about btc is half fulfilled.
The numbers for me is actually not useful because, the truth is, up until now, the population who are into crypto is still small. And such figures are all theoretical because as mentioned, not all people are interested on this market. They are just happy and contented dealing with traditional payment method and just go on with their lives using traditional banking system. A lot are still seeing not joining this market for any reason at all.