Almost all of the examples you listed occurred following a war, an intervention/support by foreign powers, or an unsustainable system collapsing.

For the US, the first two are extremely unlikely to happen, while the third is still essentially harmless if the US is the global hegemonic power and if Americans in general continue to desire national unity. While people are critical of aspects of America, most still believe in the fundamental idea and structure of the country (unlike say, the constituent USSR states.)

I don’t see any of these things changing anytime soon, so no, I would say there will not be a revolution in the next 20 years. There may be massive democratic change, but this is expected. The media and Reddit specifically is not reality and I’d be skeptical of basing your analysis on such sources.