What would happen to Bitcoin’s value if all countries banned crypto exchanges together ? Can it survive such an action ?
If that happens, there will be a massive price drop in the Bitcoin market and in some cases, people will lose faith in Bitcoin and they will want to sell Bitcoin very quickly. It is hypothetical that all countries will not ban Bitcoin exchanges together and that they will make an announcement before banning them, as the general public will then create selling pressure on Bitcoin. If selling pressure is created, the price of Bitcoin will definitely start to fall sharply. This is my hypothetical idea, but it is unlikely to become a reality.
Is the price the thing that would break faith in BTC, though?
For most - surely, but for those that understand that the price comes from the ideals that BTC has: I wouldn't think so..