As far as crypto currencies go, the biggest criticism is that it costs money per transaction vs a one time cost for all transactions with cash. You make the ca

As far as crypto currencies go, the biggest criticism is that it costs money per transaction vs a one time cost for all transactions with cash. You make the cash once, and it can be used till it wears away to nothing. The biggest criticisms imo of ethereum/smart contracts is that it's a centralized bottle neck, again due to a cost per transaction, and specifically bidding for transactions. You're coupling yourself to having one central db for everything everyone is doing, vs having microservices that fail independently. one meme can take down all ethereum transactions by making it too expensive to run a food delivery service. It's centralizing rather than decentralzing