Post quantum we will have lots of forks. But the quantum upgraded original chain with all the mined coins will be the strongest. Anyone who has the privatekey of an old address can now move their coins and they will be quantum secure. Otherwise they are 'shalecoins' and have no owner and will be 'fracked'. These coins are the reward of their 'frackers'. If some think that the 'shalecoins' should be locked/destroyed, they can use the fork with excluded 'shalecoins'. They are already discussing such things: Fork and Destroy Satoshi's 1 million Bitcoin? https://bitcointalk.org/index.php?topic=5131393.0
No matter what, a decade is not such a long time. We should be discussing this stuff today.
Yes, squatter.
Quantum computers will surprise the Bitcoin community. The 'shalecoins' will be moved and will become active. Thereafter BTC owners will decide, which fork they want to use.
The original chain will remain the strongest chain. If some groups can reproduce the privatekeys of 'shalecoins',
coins with no owner https://bitcointalk.org/index.php?topic=5134441.0, it's their reward. They are trying to build a computer in the near future, that wouldn't be built so fast without that incentive. That opportunity accelerates the technology. If there are still some BTC owners
-incl. Satoshi- with old addresses and remove their coins now, they will be secure. So it's a fair game.
And nobody can change that game: Bitcoin rewards the best technology.The Bitcoin network is a pure competition network. Only the best technology will be successful here and make it secure. A Bitcoin fork without the old coins would be like another s**tcoin, because it would avoid real competition.
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