It wouldn’t be worthless. Not sure it’s worth the current price but many illegal/underground transactions require cryptocurrencies. In time of crisis, people also trust crypto more than fiat currencies. There are economic values in these activities and beliefs… so it can’t be zero.
Here's why this billionaire investor predicts cryptocurrencies will 'go to zero'<blockquote>这就是为什么这位亿万富翁投资者预测加密货币将“归零”</blockquote>