Which is a very easily recognized pattern, color, and size. The entire point of a dollar is that every single one looks identical.
Imagine if every single dollar bill was a different color, shape, size, printing pattern, etc… Now imagine trying to block that. Now consider that as soon as you figure out how to block all of the current versions, anyone in the world can just design a new version in 5 minutes.
I still remember where I was when I saw that things had mathematically tipped past the point of no return for Hillary. It wasn’t a huge shock to me, but that’s mostly cuz I saw the writing on the wall when Hillary’s entire schtick for a while had been “no worries, we’ve got this, it’s not even a problem.” Democrat victories have historically hinged on whether or not they can motivate people to vote, and Hillary’s entire strategy did the exact opposite of that. Every single person independently went “she’s been saying for months that she already has it in the bag, so why bother voting?” And that led to her losing a lot of votes.