Don't spend that $2 bill: The rare serial number sequence collectors are hunting for

You've probably heard that $2 bills are rare. Maybe you've even saved one or two yourself, thinking they might be worth something someday. Here's the thing though, most of them aren't particularly valuable at all. 2 billion worth of $2 bills in circulation as of December 2023, and the Bureau of Engraving and Printing printed around 128 million new $2 bills in fiscal year 2023 alone. So what makes some of these bills worth holding onto while...