do you remember this currency?

yesterday as i was busy ranging money i saw one twenty naira note i cant recognize that it is twenty naira so i begin to question my self y on earth someone should think of using polymer to print money. knowing hw easily d thing can melt or washout. instead of changing them into coins since it can last longer n save the country some money used for reprinting them every time. instead they went ahead bringing the one naira n d fifty kobo that has no value in the country

the reason y people rejected d money is because there's no reasonable things to buy with them they government didn't look into this issue instead they went ahead wasting billions printing them again with all this useless expenses how will the country survive so easy? most of big n bigger countries still dey use coins till date