Here’s a quote (and thus a link) from an older thread on this topic which has lots of information and numbers in it.
The coin from making gleam doors was nerfed a good bit after that time, it was actually a problem. All of the other info there is still relevant, and current.
Just to add, making trapdoors uses the refiner, and other than offering the same numbers on coins, is faster with coils.
Topic here is coin ofc, but don’t forget this also earns you XP. Lots of people sell or discard a good portion of the XP they could have.