crypto and blockchain are harmful and have little relevance. here they are, trying to create a system that technically makes it possible for a group of people who have no trust and don't even like each other to keep a common ledger. However, trust is the basis of advancing societies and economies. In due time, these blockchains will collapse precisely because they try to replace trust with unhealthy societies and economies. the bottom is 0 because they don't represent any value and don't provide a better solution than trust among business partners.