> Cryptocurrency is a zero-sum ponzi scheme
This is repeated a lot on HN but it is easy to refute. A user can purchase $1000 of DAI and send this to another person in the world within 30-60 seconds, without the beneficiary needing to set up a USD bank account or disclose private data to a third party. The beneficiary can decide to hold this asset or exchange it to another asset such as fiat, gold, ETH, food. These are not zero-sum games - they are more comparable to a PayPal exchange than a zero-sum game.
> With stocks, there are on average more winners than losers because new value is being created.
This is questionable. Many stocks are overpriced far beyond their intrinsic value. The expectation that they will continue to go up forever and provide returns depends on people continuing to buy them at higher and higher prices, just like crypto. Some investors do not feel that NFLX and META will continue to go up in value forever, as the price already exceeds their value.
And when you own stock, you cannot do much except hodl and sell. When you own ETH, you can hodl and sell, but also use the token to send transactions to the network and interact with smart contracts.