Blockchain technology is going to change everything: the shipping industry, the financial system, government … in fact, what won’t it change? But enthusiasm for it mainly stems from a lack of knowledge and understanding. The blockchain is a solution in search of a problem.
I assume by this you mean the bitcoin mainnet and you are implying it is centralised because of mining? I agree but there are other cryptocurrencies that are less centralised. Also, you don’t need to use an exchange to transfer value with crypto, you can buy peer-to-peer on sites like localbitcoin.
This is an interesting point I think. I think sometimes the control is anonymous and sometimes it is not, for POW you can identify some large miners and for POS you can identify some large holders (e.g. exchanges).