Hashpower was concentrated in China. It takes time for the miners to relocate and setup shop, I'd be surprised if the hash power is permanently reduced. I don't

Hashpower was concentrated in China. It takes time for the miners to relocate and setup shop, I'd be surprised if the hash power is permanently reduced. I don't think anyone reasonable is claiming that BTC is completely safe against state attackers. That's the mission but nothing is 100% certain.