Do you think you have to earn enough to be in the top 1% of all earners in the country in order to be 'rich'?
Not that it really matters, since what catches fire politically is only modestly correlated with what is actually true.
The implications of that are many but the first and direct is that the US is a plutocracy. That is, the movement is not about (not) "becoming rich" or achieving the 1% (which as you imply would ultimately be a contradiction) ... It is about the nature and sustainability of such a society.
Half of the electorate pays no federal income tax in the U.S.