The “unemployed slacker” stereotype of leftist protesters that many conservative Americans have seems to Germany, anyway.

London's Daily Mail reported on a survey done by a Berlin newspaper which revealed that an overwhelming number of the protesters who were arrested there are all males under 30:

The vast majority of left-wing protesters arrested on suspicion of politically-fuelled offences in Berlin are young men who live with their parents, a new report found.

The figures, which were published in daily newspaper Bild revealed that 873 suspects were investigated by authorities between 2003 and 2013.

Of these 84 per cent were men, and 72 per cent were aged between 18 and 29.

They aren't all unemployed, but the report found that most still lived with their parents:

A third of them were unemployed, and 92 per cent still live with their parents.

As yet, there have been no surveys conducted to ascertain the demographic breakdown of the Trump-era protesters, but pollster Douglas Schoen did interview the original Occupy Wall Street crowd back in 2011 and found that (according to them, at least) far fewer were unemployed:

The vast majority of demonstrators are actually employed, and the proportion of protesters unemployed (15%) is within single digits of the national unemployment rate (9.1%).

Again, that was just the Zuccotti Park Occupy group in New York, and not representative of the many Occupy camps that existed throughout the U.S. in 2011. As the movement spread across the country back then, homeless people joined the camps in large numbers.

Of course, many people who are unemployed are unhappy about their financial situations, so protesting might become attractive to such people—on the left and on the right.