I can just say a little :
- electricity this is already debunked if you're saying btc is electrically demanding - the same goes with facebook.com . And that's not the end of it, free market rules, if it's cost more to mine one bitcoin then people will just not do that.
- Also what scalability have to do with centralization I can't square that circle. If you follow max keiser : he always say something about 'hash-war' maybe you can research more about that.
- Finally at least BTC is the first coin ever invented, it will never go easily. This is not sh*tcoin we talk to.