I don't think so that cryptocurrency can go down and get into becoming zero because despite of the fact that cryptocurrency is always experiencing a dump in the price, there is no history based on my experience that the whole cryptocurrency have drop down into nearly zero. Well, the cryptocurrency have really started from scratch which is zero way back from where it started but because of the advent of technology, people already recognizes its existence and worth so people do already know about cryptocurrency and now many are starting to get engage and continuously using cryptocurrency which makes the volume of demand to grow higher as well as the price of every cryptocurrency existing in the market. I think even we undergo a bearish market, cryptocurrency can never go down to zero for there are already lots of people involve with this industry that will not allow such thing to make happen. Cryptocurrency can go ups and downs which is normal and we always witness how it bounce back after experiencing a downfall but for it to get into zero, I think it could not happen specially for now that people already knows about it.
Exactly. Crypto is widely known in the mainstream world, so I doubt it'll ever go to zero in terms of price. Of course, cryptocurrencies without a market, will die in the end. Even the most useful cryptocurrencies for everyday people, have experienced major downfalls in price across the market. If Bitcoin, Ethereum, and other top coins in market cap experienced a downfall in price, imagine where useless coins would be right now. A cryptocurrency project needs to deliver real use cases for the mainstream world, or it'll become another speculative instrument. Most developers tend to abandon their projects over time, resulting in a price of $0 across the market. After all, no one would want to invest in a coin that cannot serve a purpose in life.
With everything crypto has gone through, it's hard to tell if it'll ever go to zero in terms of price. There are still a lot of people supporting major cryptocurrencies like Bitcoin and Ethereum, while mainstream businesses and companies are praising Blockchain technology itself. It's been around 11 years since Bitcoin was created, yet it has remained a valuable coin despite the recent setbacks. For the entire crypto market to go to zero, something catastrophic must happen that would virtually "stop" people from using crypto in their daily lives. The only thing I'd see this happening is if the entire Internet is shut down. But that's very unlikely to happen as both crypto and the Internet are proven to be resilient and widely distributed worldwide.
Nonetheless, it's safe to say that while crypto may experience "bloodbaths" every once in a while, it'll never go to zero because of the aforementioned reasons. Just like precious metals are still being used today, crypto will prove to be a viable alternative to the existing monetary system sometime in the future. We should be confident that the decentralized nature crypto and Blockchain tech will allow us to remain in control of our money no matter what happens in the mainstream world. Just my thoughts