Hm, hard to say how the broad picture looks like.
Maybe the transaction volume processed by payment gateways is decreasing, but the number of BTC transactions per day seems to be growing according to
https://www.blockchain.com/chartsThe transaction per day that continuing to grow is one of the proof that the adoption is occurring. In my community, there are more people who interested to use bitcoin in their daily transaction. There are now also many Bitcoin atm in my community and it seems that many people are really interested to use and buy bitcoins.