@grobmeier @sandofsky crypto isn't the problem. Blockchains are the problem. Crypto currencies based on block chains (which is 98% of them) have a constantly increasing energy usage. The longer the block chain gets, the more energy it takes to validate it. At this point more than 50% of some nation's energy consumption goes to crypto mining. Directed Acyclic Graphs are significantly more efficient in terms of energy consumption, and much faster.