They look like tickets to a museum exhibition. Traditional currency with all its engraved and complex images and backgrounds was designed in a co-evolution with counterfeiters, this stuff looks like it would be easy to copy. Of course our modern paper money is all in a way counterfeit.
Rainbow money.
The guy says vertical makes more sense, but the large number is at the bottom, covered by your hand or the other bills. Try it out. It could also discriminate against left-handed people.
You should put the Tepee on the 20 dollar bill. Some Native Americans won’t use the bill because of what Jackson did to their ancestors.
“Blue Bucks?”