Note: This story is a fiction of the future. It’s not exactly what will happen to Bitcoin.
The year is 2140. A apocalyptic disaster hits planet Earth. Human civilization is wiped out. Humans die of starvation and disease. Bitcoin mining network is down. Bitcoin satellites are still flying around Earth. But nobody communicates to them. Hashrate dropped to 0. No new block is created. Pockets of human survivors are trying to make through their days.
Bitcoin is dead. Except, it isn’t. It’s just silent. Its enormous difficulty is still waiting for someone to mine the next block. But nobody can. Much of the mining infrastructure is destroyed. Bitcoin death prediction was wrong. Civilization can collapse but Bitcoin is still there. Without sufficient hashrate, nobody can attack the Bitcoin blockchain.
Fast forward 100 years. The year is 2240. Humans rebuilt their infrastructure. They are about to reach mining hashrate before the apocalypse. Some groups of humans are able to recover bitcoins from exchanges. Having centralized exchanges can be useful for recovery effort. The network is about to produce new blocks.
But this time, Bitcoin splits into 2 chains. Some people want to soft fork and restart mining rewards since so many coins were lost. The total theoretical supply limit of Bitcoin will be 42 million. Other people want to stick with the original supply limit of 21 million. The first group achieves majority. They took the domain name, social media handles. They anoint new leaders and proclaim themselves to be the true Bitcoin. The second group is angry. They rename their chain to Bitcoin Apocalypse to remind people that they are the Bitcoin chain before the apocalypse. And they also vow to bring apocalypse to the self-proclaimed true Bitcoin chain. Just like the forks that came before, Bitcoin Apocalypse will fade in memory.
Bitcoin is still not dead. It continues to live along with humans. It adapts to the majority consensus. It’s sneaky and controlling. It feeds and survives on human’s desire to fight and control. Bitcoin sheds its old self if necessary. It rules over the world of cryptocurrencies. Its existence seems to immune to human’s suffering and will.
The End.
This comes from two things I learn recently:
1. Hashrate drop to 0 is not going to kill Bitcoin. The network just goes to sleep.
2. Bitcoin doesn’t have to be completely decentralized.
Well i do have a lots of criticism to make of this, on various aspects. First i don't see the need to take this to "100 years", only to do it again. Yes by the year 2140 is expected for the last bitcoin to come, but by then or in fact several years before that (like a hundred lol), bitcoin production will be so slow most people would have forgot you could still mine it. Someone mentioned Dogecoin, and that is a good example. Its unlimited, and almost no one mines it, but you still can. Of course its absolutely worthless and you would lose more which is why almost no one bothers (it gets a bit of free hashrate from mixed mining). Bitcoin is going to reach a similar stage, far before the last coin is minted. By the year 2040, or 2090 at most.
Going from 21 million to 42 million doesn't really make much difference, even if most of the coins get lost. Unless you want to answer the ultimate question, but there is some other altcoin names like that... Before you think 21 million bitcoin is too little, try to count that in satoshis. 100 million satoshis make 1 bitcoin, i think even one bitcoin is plenty to go around... It would not get consensus as you naively think, and its not worth forking for that.
Also in the event of a catastrophic drop of hashrate, your little cpu could mine again. Sure, someone would need to update cgminer or an alternative...
Satellites, need fuel to stay in place. They might last long, but not as long as you think. Typical communication geostationary satellites need replacing every 10 years or so because of that (and yeah, they also get bombarded by the Sun's radiation from time to time). Satellites aren't very long lasting, a good LED light can probably outlast a satellite, unless a major discovery in propulsion is made that doesn't use any kind of "thing that runs out" (ie, that infamous EM drive).
Perhaps i would use something on the moon, or Lagrange point. Yeah, its not impossible to think somebody will be able to land the equivalent of a satellite on the moon surface and let it operate from there (The Israelis almost made it, but i guess they had a technical glitch and kinda couldn't stop properly...) I'm sure someone could just put a node with some little hashrate on the surface on the moon, same way they are doing with satellites. It is very unlikely hashrate will ever drop to zero, unless its something that wipes the human race...