There are many other ways to invest one's money that isn't as harmful to the environment as crypto. You could invest in renewable energies, alternative foods to beef, as well as many others.
https://www.independent.co.uk/clima...nt-mining-energy-cryptocurrency-b1819545.html
This is a direct answer from Google on Bitcoin alone: Bitcoin's annual energy consumption is comparable to some entire countries, such as Argentina and Ukraine. Bitcoin produces 36.95 megatons of carbon dioxide (CO2) annually (comparable to New Zealand) and it is estimated that in 30 years Bitcoin could alone
increase global temperatures 2 degrees Celsius.
https://www.msnbc.com/opinion/bitcoin-nfts-other-crypto-fads-are-destroying-our-planet-n1261139