By looking on coingecko, you can notice a volume declining over the years and I might identified the issue, that could be seen as an iceberg.
Visible level : Spot/Perp/DEX prices
Deep level (not tracked) : crypto-swap exchange, localmonero or atomicswaps
Theres a looot of volume not tracked in the deep level, since a monero user is most likely using these ways (just look the last bad new it was a “nokyc” swap)
How this can be solved ?
BasicSwap DEX Desperately needs an appimage release and an option to connect to remote nodes. That way anyone on any linux can just use it. If they do not do this they will have 10-15 users.