The comparison is wrong , btc is showing transactional value ,not ppl spending ...
Why by now we don't have an organization which facilitates stores (physical and online) to integrate btc payments in their payment systems .
There are many fragmented platforms ,even I use such a service online to accept crypto payments but not a non profit NGO developing ease and use of crypto without any hidden agenda of pushing their own asset etc.
Using crypto cards to pay using crypto and settling them on VISA is no win in the long term , that's we settling for the lesser.