I think you are making a mistake by only looking at cryptos as "coins". There are businesses being run on and around public blockchains and the cryptoeconomic

I think you are making a mistake by only looking at cryptos as "coins". There are businesses being run on and around public blockchains and the cryptoeconomic incentives will ensure the perpetuation of the network. As long as there is value in maintaining public blockchains, their tokens (BTC, BCH, ETH, etc) will hold monetary value. https://i.imgur.com/AfGNEA5.jpg https://i.imgur.com/AfGNEA5.jpg