I have lots that most collectors would consider spenders. I spent a bunch before I finally realized it's my collection, not theirs. Just because they wouldn't hold on to it doesn't mean I can't. The whole point of collecting is to get enjoyment out of it. If you find something that you like, then I say hold on to it.
I honestly think it may be worth a buck or two to the person who wants to find a 1999 birth year note.
Thank u all for the feedback. Im going to keep it..the serial is unique to me. I also got a $1$1 in change tonight with the serial 11111889. I think its pretty interesting so I am going to keep it