It is not supposed to be a cheap payment system? Go and read the original document. Everything you're regurgitating here is a retcon from the BTCYou're are clearly out of your depth here and don't understand how the Bitcoin network operates. It's not supposed to be a cheap payment system. Security is the first priority, not transaction cost or speed.
You said BTC is highly centralised, and when asked relative to what you say it doesn't matter. Schoolboy response. You can't name a competing store of and transfer of value blockchain that is less decentralised and more secure. You started off by suggesting that Ethereum was with your initial response which obviously was a big fail. Until BTC improves or something better comes along BTC is the best at what it aims to do.
You've shown me nothing. BTC's level of security is reliant on BOTH it's energy use and the amount of full nodes. It's not either or. Even with a 35% mining pool blackout the amount of full nodes on the network still makes BTC the most secure blockchain, and the remaining 65% hash rate is still enough to made BTC impossible to 51% attack.
You don't understand that in the case of a temporary mining outage the full nodes (which are extremely decentralised as shown in the link I posted before) ensure that transaction authentication is not compromised. Yes, there is a temporary increased congestion and increase in fees, but the size of the network ensures that BTC can handle even a 35% mining outage without compromising security.
Yes so over 60% of BTC's hash rate is concentrated in China. Obviously not ideal, but not at all a significant security threat when only 2% of full nodes are located in China. These exist to secure the network - verify transactions and blocks, and send them to other nodes including miners. Very few of these are mining pools. Get your head around that and the importance of that. You've been buying into uninformed mainstream media narrative.
I am not here to spoon feed you and educate you. You've been here how long but haven't bothered to learn any of this? Hopefully this wasn't all a waste of my time and some others might have learned something here. There is Bitcoin.org and google if you want to learn more.
You're literally taking everything I said out of its context and twisting it to suit your own narrative when it shows the exact opposite of what you claim. The network is not so secure as you claim. We have seen this time and again where mining power is in the hands of only a few individuals.
Maybe you should go back to the original idea and then examine how things turned out and what the actual effect was before coming back to your argument.

