Game Design Zhights Quest Problem

So basically after I finished the quest I got 16 zhight money. I went to the merchant and saw the zhight money in his slot. I clicked on it. I didn't see what it did so I clicked again I looked into my inventory and out of my 16 emerald blocks none were left. So of course I freaked out, I looked all around and saw instead of 16 zhight money I saw 18 zhight money. I checked the banker and saw 8 emerald blocks per one. So I tried to calm down and I went onto the wiki to see what I could use it for. I could use it for wisdom potions ONLY I mean all that money and I could get wisdom potions which I could get other places. I went back to the banker and saw that there is no way to get your money back. I was a little upset (or a lot) But I decided to get the boat pass and move on the problem was I don't have enough money only 16 emeralds. so I ended up taking a boat and getting lost the whole way back to nemrack.
My proposal is the banker should also have a sell options so you don't get stuck with my problem. or maybe more uses for the zhight money in the first place.

 

You should check what you're paying before you click an item in the shop!
Also, Zhight island has hostile mobs in a cave you can grind if you need money.

The main reason this isn't a thing is because you can get Zhight Money from the Seaskipper, so this would make it possible to use the seaskipper to grind EB extremely quickly.

 

This is all good and all but as a level 55 all the emeralds you had where 8 blocks?

 

It's not the games fault you did the thing...