A closer look

While Hollywood heist movies always feature neatly stacked briefcases of hundred-dollar bills, real criminals aim significantly lower. The $20 bill is the absolute sweet spot for counterfeiters. It is large enough to be worth the printing effort, but small enough that exhausted retail workers aren't going to aggressively check it with a counterfeit pen. It moves effortlessly through cash registers, proving that flying slightly under the radar is the true key to a successful criminal enterprise.