I try to put myself to their shoes and if I am not mistaken, there's a probable reason that they advertise bitcoin because they want to detach to their financial system. But I can't still find the relation ship why they need to do it in relation to promote anti racism of colors. Because basically if they want equal treatment, there's no reason for them to associate bitcoin with their sole purpose of being part of the protest.

One other factor is that, maybe these people are just die hard fan of bitcoin that's why they take the opportunity to advertise it. I'm just not convinced how appropriate it is to be mixed with racism protest.

A better advise could be, wear those shirts and hold those tags in a football match or any mass gathering events not this protest. It's kind of awkward and cringy believe me.