1. crypto has only really begun to be valued so far, and this stage is still in its infancy, so we don't know how long encryption will last. I think there may be a century.
2. If the encryption is dead, then it is at most another "tulip". Unless you convert all assets into cryptocurrencies, it will not affect us much.
3. The government does have the ability to kill encryption, but the government will not do this because everyone is interested in it, and it is impossible for a country or several countries to kill it. Unless most countries around the world want it to die.