I say laugh when you genuinely find something funny. Exhausting BS isn't funny. And when you've heard it 1000+ times then you've had lots of time to come up with a simple intelligent response.

The code is open & there is no central point of control. The CIA wouldn't create a money they can't control.

Miners don't emit CO2 & the climate scam was created to justify taxing & controlling all life & production.

Monetary network effects are very different from social media network effects.

Dismiss nonsense with a proper simple explanation & tell them that when they are ready to learn you are happy to help or to point them in the right direction.