If we have large miners each pair with a quantum lab, they have no incentive to mine on top each other's blocks because there is a literal multi-million bitcoin incentive not to.
First, who's to say that centralized mining pools will even be around by then? It's entirely possible that decentralized mining becomes normal with pools that don't send out universal templates that force a particular set of transactions, in which case, the cooperation scenario of mining conglomerates/quantum labs is void.
Even in the nightmare scenario, you might get large miner/quantum lab pairings that don't cooperate with the rest of the network, but my gut says they would cooperate instead. If you have 3 uncooperative chains of 50 blocks each, no exchange (or vendor, or OTC desk, or individual) is going to take deposits, especially from the conflicting transactions which spend patoshi coins. And think about what the price action will be like if there are 3 possible chains, any of which can wipe out the other. As a miner/quantum lab, you likely won't be able to cash out unless you cooperate with other miner/quantum labs so that there's 1 chain. The entire ecosystem functions because there's agreement on what the state of the Bitcoin ledger is. If you break that assumption, everything else breaks as well. So the "multi-million" bitcoin incentive to build on your own chain run into the non-functioning of normal Bitcoin functions if you have multiple chains. The incentive will be to cooperate, because that's the cleanest path to making back whatever investment you made into quantum to find the private keys.
Incidentally, I think the scenario of quantum people just straight dumping all the coins to crash the price is extremely unlikely. Most likely, they'll try to find large buyers for the coins instead, which is what large whales do now. And if Bitcoin survives the release of the patoshi coins, I think we'd be in for a huge price increase due to the removal of uncertainty around those coins.
First, who's to say that centralized mining pools will even be around by then? It's entirely possible that decentralized mining becomes normal with pools that don't send out universal templates that force a particular set of transactions, in which case, the cooperation scenario of mining conglomerates/quantum labs is void.
Even in the nightmare scenario, you might get large miner/quantum lab pairings that don't cooperate with the rest of the network, but my gut says they would cooperate instead. If you have 3 uncooperative chains of 50 blocks each, no exchange (or vendor, or OTC desk, or individual) is going to take deposits, especially from the conflicting transactions which spend patoshi coins. And think about what the price action will be like if there are 3 possible chains, any of which can wipe out the other. As a miner/quantum lab, you likely won't be able to cash out unless you cooperate with other miner/quantum labs so that there's 1 chain. The entire ecosystem functions because there's agreement on what the state of the Bitcoin ledger is. If you break that assumption, everything else breaks as well. So the "multi-million" bitcoin incentive to build on your own chain run into the non-functioning of normal Bitcoin functions if you have multiple chains. The incentive will be to cooperate, because that's the cleanest path to making back whatever investment you made into quantum to find the private keys.
Incidentally, I think the scenario of quantum people just straight dumping all the coins to crash the price is extremely unlikely. Most likely, they'll try to find large buyers for the coins instead, which is what large whales do now. And if Bitcoin survives the release of the patoshi coins, I think we'd be in for a huge price increase due to the removal of uncertainty around those coins.