This guide will let you know how to make infinite cash in Terraria. It is a glitch that will help you to earn a lot of money.
You need any shell or starfish, hammer, wood platform, and any block.
Make your way to the ocean and grab these shells.
You can build with any block, four blocks high, then two platforms, and hammer it in such a way as shown in the image below.
Grab those shells and put them on the platform; it will give you infinite cash.
It only works with shells, including starfish.
Tulip shell 20 silver each and the Lightning whelk shell 20 silver each. You have to get the most are the tulip shells and lightning wick shells, as these cost more than the rest.
You can sell them and make dollars. But be sure to keep several before selling, so you can dupe more.