There have been a number of responses to the letter, such as this one by Preston Byrne:

Debunking the Crypto Critics Letter | Preston Byrne

https://prestonbyrne.com/2022/06/01/debunking-the-crypto-critics-letter

bitcoin

Tech experts urge Washington to resist crypto industry’s influence | Financial Times

cryptocoin

There have been a number of responses to the letter, such as this one by Preston Byrne: 

*Debunking the Crypto Critics Letter | Preston Byrne*
https://stacker.news/items/33400
https://prestonbyrne.com/2022/06/01/debunking-the-crypto-critics-letter