Ah yes, fear is in the air for the dinosaurs of money. One could expect this though, they will not go away peacefully or join the monetary revolution, but rather use petty slandering, threats and mafia type exertions which are all actually common tools for thugs in the banking world.
https://www.nytimes.com/2020/09/20/business/fincen-banks-suspicious-activity-reports-buzzfeed.html
But that doesn't stop them from taking their imaginary role of moral hero and preach to others of course.
https://www.chron.com/business/article/It-is-a-bad-idea-for-El-Salvador-to-accept-16241767.php
So it will not come as a surprise they will do more than just hope for El Salvador to fail with Bitcoin as legal tender. Expect the worst from them and remember, in our modern world money is used as a weapon and a tool to inflict damage on others, and the currency used as the international reserve has (soon had) the most power to inflict that damage. Don't agree? Ask Cuba, Iran, Venezuela, Syria, Yemen, Iraq, Lebanon, North Korea or Afghanistan how many innocent civilians died before a single bullet was fired.
https://www.independent.ie/world-news/sanctions-have-killed-500000-iraqi-children-26114461.html
So I take it it's just a coincidence that as Bitcoin is disarming the savages and restoring the balance of power, it's *precisely* them who are "warning" us the most about the dangers/pollutions/risks/instabilities of Bitcoin.
https://cryptobriefing.com/senator-elizabeth-warren-slams-bitcoins-energy-usage/
https://www.theguardian.com/commentisfree/2019/aug/27/imf-economics-inequality-trump-ecuador