First watch this vid.
https://www.youtube.com/watch?v=3LSBZtL_sLsCrypto is incentivising people to destroy the planet.
At the moment the world is focused on getting rid of plastic, I'd say crypto is what we need to get rid of next.
If your crypto isn't green it's going to be taken out and shot. If your favourite coins don't destroy the plane they might have a future.
Your post shows a lack of understanding of the fundamental science behind cryptocurrencies. Crypto has nothing to do with destroying the environment. And by "destroying the planet", I'm guessing you mean all the energy that goes into mining Bitcoin and other proof of work based cryptocurrencies. Bitcoin and several other cryptos use proof of work, which requires a huge amount of power. But, that is not a property of cryptocurrencies in general, that was one implementation to make the network more secure. In the future, cryptocurrencies will adapt to be more energy efficient, and that is already happening. Thus, your post is not considering advances in technology.