Bitcoin mining became centralized because of the tech improvements of like 1000% every few months. This also gave China the advantage because they are a big silicon producer.

Bitcoin mining tech has now run into Moore's Law, which means an increase of only about 2X every 18 months. This will decentralize BTC mining, but it will take a few years.

Also, BTC will certainly go up a lot in the future.

I'm not worried about mining centralization or the price of bitcoin.