I can't see any conceivable way that happens at this point. Even a coordinated effort by the world's governments to "ban" it (they can't really ban it) would not drive its price to zero... if anything it might even have the inverse effect.
Can you provide any conceivable way this would actually happen? Maybe an asteroid hitting Earth and wiping out all human life on the planet?
1. Tether defaults.
2. People panic and sell at whatever price they can get. Let's say Bitcoin drops to $10k.
3. All miners that don't make a profit at $10k shut down.
4. With most miner's shut down, block times go from 10 minutes to 1 hour.
5. The fees to transact Bitcoin go up exponentially as people rush to get out. 10 Bitcoin to make it into a block, sure!
6. The price drops further.
7. More miners stop mining.
8. Block times go up so much that it will take the miners YEARS to reach the difficulty adjustment point that normally hits every 2 weeks.
9. Blocks stop being created, and the price is essentially 0.
With China shutting down a lot of their mining, this is less likely than in May. The higher it goes, the more likely that a sudden shock can destroy it all. Eth has shorter block times and would be able to stabilize better. The block fees going up might actually save the system to keep enough miners mining, but I also think they will scare users away from buying at cheaper prices.
I think some of these are a stretch. I think some of these would definitely happen if the things up to them happened.
if the stakes are high enough, code is not law, even in btc land
I have no idea how that would end up, how quickly they could organize, and what would happen in the mean time.
I am little bit paranoid of holding 100% in BTC, the reason for this is because of Satoshi Nakamoto still holding 1 million BTCs. Nobody knows who this guy is, if he's going to spend all his bag, that's a sure fire way of bringing down BTC significantly.
Anyway, I'm still in to BTC, it significantly changed my life. I wish Nakamoto would publicly burn most of what it is in his bag.