Okay coming back here with the recent China Ban Bitcoin again FUD from China. Is this a good thing now for Bitcoin Hash rate becoming decentralized now?
It is too soon to say the miners will actually migrate from China and the mining crack down is real. I see geographical decentralization for Bitcoin mining is good
China has cheap electricity so which countries the chinese miners will move to that also has cheap electricity so the chinese miners can continue mining btc if China really goes ahead with this FUD?
If mining farms migrate to other nations and can not find cheap energy resources as same as in China, the mining cost for Bitcoin will rise. It in the long term, will contribute to higher price of Bitcoin.
Net-effects of them, assumes that FUD is real, will be good in long term but on my view it is not the case, it is FUD.
Despite of all FUD from China, hashrate increases and difficulty adjustments in history are mostly positive (see the chart of mine).
But if electricity isnt cheap in other countries where the Chinese miners migrate to then this makes mining unprofitable right so chinese miners will ditch bitcoin mining right? If chinese miners ditch btc mining then wont this affect the security of the btc network?
Which countries allow Chinese nationality citizens to migrate there without a visa?
OP, You are obsessed with China ..... and it is not a issue at all.
Yes, ASIC chips that are used for mining are manufactured in China, but a lot of those chips are exported to other countries. There are massive mining farms in Iceland and other countries too, so all mining are not located in China.
The Chinese government can seize all the mining equipment in China and it will not have an drastic impact on the security of Bitcoin. (Doing a 51% attack on Bitcoin is almost impossible now, because it requires a huge amount of hashing power ...and even if they succeed.. people will shift to other Pools to protect Bitcoin.)
After their first double spend, developers will make some changes (possibly a hard fork) to spoil their attack (That was something Gavin Andreson said, when he was still lead developer of Bitcoin) ... or people will simply shift to another Alt coin or hard fork to another new coin.
It will cost them an awful amount of money to sustain an attack like this, so I cannot see that this will continue for more than one day.

How much does a Quantum Computer costs and how much energy a Quantum computer takes in relation to Bitcoin mining?
When you say it will cost them a awful amount of money to sustain an attack then how much approximately in $millions will it take to do such an attack on Btc?
[moderator's note: consecutive posts merged]