A simple reason why Bitcoin will never go to $0 is because there are people out there that will snap up every last single one at a given price point (myself included). Keep that in mind next time you are in fear of $0 Bitcoin.
If at some point where the mining farms go out. Say they just don't wanna mine anymore cuz they ain't making any money to pay for the energy.
Then the blockchain would be so slow, nothing would be able to run right?
Or would the chain change difficulty to accustomed the new mining computers?
But that'll take 2 weeks. Most other coins update difficulty every block. BitCoin takes 2 weeks right?