“Coins are made of metal, because change is hard” is a one-line saying of unknown authorship that has been cited in print since at least 2008. The monetary saying was posted on Reddit—Oneliners on July 4, 2017.
 
       
Free Speech Horse Forum
JOKES
Foxhunter
Sep 15 08 6:41 PM
(...)
Why are coins made of metal? Because change is hard.
 
Twitter
Rachel‏
@rach78
RT @moonfrye My fav quote is “Why are coins made out of metal? Because change is hard.”
11:54 PM - 14 Mar 2009
 
Twitter
Adalberto Hernandez‏
@ahvega
Why coins are made of metal? Because change is hard.
3:22 PM - 26 Jul 2009
 
Twitter
DeEtta Turner‏
@deettaturner
Why are coins made of metal? because Change is hard.  Katrina Bock
6:24 PM - 21 Sep 2009
 
17 October 2009, Statesman Journal (Salem, OR), “Change is one of those unavoidable things in life” by Hank Arends, pg. C1, col. 1:
It is a groaner of a joke, alright, but it does make a point.
 
“Do you know why coins are made of metal? Because change is hard!”
   
coldturkey
Reader’s Digest. A Collector’s Choice.
Written by coldturkey
January 12, 2016 at 9:26 PM
(...)
There was my favorite – Laughter, the Best Medicine. I’d always go to this page first; “Why are coins made out of metal? Because change is hard. What do you use to fix a broken tomato? Tomato paste. Whoever wrote this one should really catch up.”
   
Reddit—Oneliners
Coins are made of metal, because change is hard. (self.oneliners)
submitted July 4, 2017 by GreggUMC