Love the idea that we can make coins - can’t wait to have chests of money in my base, but wait, the Smelter IS a thief !! 
So I get some Silver Ore - 3 of those makes 1 silver bar, nice.
I can then make them into Coins, great, 1 Bar makes 5 Coins, nice.
Now I have some Coins and need a Bar, wait what?, The smelter needs 30, yes 30 of my coins to make a single Bar?!?!
I think he’s on the fiddle guys. Off with his hands
Wow… you know times like these thieves would have chopped their hands of. at least the left ones… 
just how you said it.
Silly EA bugs right? Where are the exterminators when we need em?
To be honest i wasn’t catch this because I wouldn’t bother to put a coinmold into the furnace at all. there are plenty of coins to get as loot. So nice catch.
I dont bother making coins at all. nothing worth buying.
I only do it to have treasure chests of gold and silver coins in my base
having said that, now the pirates will be looking for your base. 
I only play PvE PvP is too toxic and frustrating for me, I enjoy a peaceful life.
same although I have pvp enabled on my server for friends. I just have a server rule.
no open pvp or raids unless your clans declare war with each other and if you pve and join in a pvp battle, you are now part of the war declaration.
boots and bans for violators.