He goes on to say "crypto is the poster child for the environment from 1990 - 2022 when we had unlimited volumes of capital. Now with that the money is going away, crypto is going away"
Doesn't make sense! Money isn't going away! We are going through a mild crypto winter and the situation will be normal again and we will see an influx of capital sooner than expected. It's just that FTX collapse and ongoing legal investigations against Binance are putting the market at risk and that's why a lot of investors are pulling away their capital. They will be back shortly.
On future carbon taxes, which I agree with, the bitcoin network can easily operate on a fully renewable grid - the problem with renewables is they are intermittent and the energy requires storage. Neither of these limitations apply to the Bitcoin network.
The problem with renewable energy is that they require a large amount of investment, to begin with. Once it is set up and running, the operating cost is much lesser than any conventional source of energy. Such kind of large investment is usually out of the reach of a startup or a small company. We may see a completely different picture if the market comes back to its former glory so that mining companies are able to collect the fund. Right now it's somewhat dicey.