No. The societal impact of crypto currencies is net-negative.

I know the original idea. In 2009 I bought coffee using Bitcoin. I had to wait 30 minutes till it went through despite using a fee that back then mirrored what PayPal would take. Then I knew: OK this is not going to be used as a cash replacement.

Then it became clear that it was used as a way to pay for illegal shit on the internet, be it drugs, botnets or services of questionable ethical value. Of course also to speculate, to launder money, to blackmail, to extract ransom, to run ponzi schemes or rug pulls, which became a big driver by people who wanted to get the wealth without having to put in the legwork.

And these are still the main drivers behind crypto currencies today by a wide margin. So yes: Net-negative. Prove me wrong.