Hear me out: I think we got too popular too fast. The normal person on the ground would expect to use crypto much more for daily-life transactions but this is not currently the case. Maybe we needed some more time for the technology to mature (no scaling issues, slow transactions, etc) THEN the normies come in. Right?
Anything on this world do really need a sufficient time to be developed and when it comes to cryptocurrencies theres no need to fasten it up. Adoption would always vary on how people would make use of it but one of the biggest factor that do affect adoption is on government itself. It might give some noise but if law or government would block such thing then expect things would be slowed up. Talking about scaling issues and slow transactions, its normal but once upgrades being implemented then expect what would be the next move.