So you are saying that the stickers cannot be easily removed?
No, I have no idea whether they can be removed easily or not. How many products have you ever purchased that had stickers on them which were a breeze to remove? Just saying that if you put them on your coins, they ain't going into vending machines or coin counters. If you put them on your bills, they aint going thru bill machines.
And if I'm a teller in a retail chain store and you hand me a bill with a sticker on it, depending on my employer's policy, I may not be allowed to accept it because it will ultimately be rejected by my store's currency counter.....
Go ahead, buy the stickers, put them on car windows or bumpers, storefront doors, merchandise displays, or anywhere you want........if you want to put them on your coins and currency then by all means do so........