This is quite interesting. I knew that there wouldn't be an end to this story yet.
However what I'm concerned is:
not so sure about this, even in the remotely case that all farms will be build in china, there will be always a big competition between those farms, it's no like , all these farms belong to one entity only, and as long as there are multiple pools everything should be fine
I wouldn't be so sure of that. Currently 37% of the hashrate is labeled as 'unknown'. How would you know if this is a single entity or not? You could always look at the IP addresses that are solving the unknown blocks, but that doesn't tell us too much. The first one is in Iceland and is solving quite a good number of blocks.
Or people to actually mine at their house with miners like the "new-rbox"
If we are only going to mine for profit BTC will become centralized zero questions asked.
For the 1000th time, if you think you are a "bitcoiner" and you are not mining you are not a bitcoiner.
The problem lies deep within each human. The majority are led by greed and thus they won't mine (home;hobby) because they can't profit from it. I guess that the era of home miners is long gone.
Also, that last part is very wrong.