At this point, saying crypto will go to zero is like saying the internet will go to zero, meaning no one will use it. Yes, crypto can drop wildly but the only way they go to zero is if the energy they use for mining stops. Government intervention is not a threat since there are countries that are actively supporting it. The network effect is hard to overcome. Bitcoin and Ethereum are two that will weather just about everything. Also, both bitcoin and ethereum are development platforms which gives them staying power. The price might collapse but they will be around as long as people are willing to join the network to mine it and use it.