If there is a ban, it is trivial for the government to force the person to hand over all the PoS coins they own or face prosecution. How long it takes to move it elsewhere is meaningless.
So you will be handing over your bitcoins instead of facing prosecution.
You missed the part about storing the PoS coins in friendly country.
Tell those PoW miners how meaningless those thousands of Dollars they lost from downtime and shipping cost and new location costs,
I imagine they would disagree with you.
Another example:
Say you are in the Ukraine, and a missile just destroyed your warehouse full of PoW mining ASICS. You are officially now done and bankrupt.
However say your PoS Staking Laptop was destroyed.
PoS Stakers can go buy any cheap $500 laptop, restore their coins from their encrypted offsite backup and be back up and running in 12 hours.
If we are talking about hypothetical situations, then there is no need for a missile, a simple free malware can destroy the PoS staker's funds without any way to recover it.
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You kind of missed the point of encrypted offsite backups.
As a PoW supporter you should at least know how to backup your private keys, why do you think such a
simple thing is beyond a PoS staker.