I think listing HIVE -> Base Blockchain as a pair (which I am working on right now with our new https://leodex.io upgrade to aggregate Hive to Base, ChainFlip and over a dozen other new chains in addition to the ~6 we have right now) is the critical lead domino here
Once we have HIVE/HBD/Hive L2 assets <> Base Blockchain assets, I'll have my foot in the door to push for a HIVE Listing on Coinbase.