Only a small portion of the mining gear at any given time is the latest ASICs. If it were not so, then depreciation costs would be huge.
I doubt that actual average mining costs across the population of miners is anywhere near $50. We know of course that the marginal miner has a cost of 1 BTC (currently $385). For the average to be $50 it would have to be like a step function from $50 to $385. Very doubtful.
The Chinese miners are lying.
Expect corruption at the highest levels. Probably are getting subsidized electricity for free. Etc.
Bitcoin has already been 51% attacked.
Agree with this.
End of story.
Not really. One of the nice things about PoW is that attacks are never permanent.
MUST eliminate profitable mining (my design)!
Implement,
write publish a paper, do something. I'm close to just joining the group that ignores you as a useless talker for years. Not quite there yet, but getting there.