Bitcoin mining is also its transaction reconciliation process, so at some point too, it affects their ability to sell BTC at all. That point won't be reached ea

Bitcoin mining is also its transaction reconciliation process, so at some point too, it affects their ability to sell BTC at all. That point won't be reached easily at all (the "difficulty" adjustment will try to keep transaction processing rates steady as miners get shut down), but truly global enough ban with no miners means no further transactions may be processed ever. Again, that's not an easy or likely outcome knowing the nature of Bitcoin's intended resilience against it, but it is a possible outcome and knowing it is a possible outcome can indeed affect price today. (Markets take such uncertainties into account.) Bitcoin can't make transactions if it doesn't have miners. Miners are not just for coin production, but for all transaction processing.