How much can I earn from this?

Depending on what software. It all depends on luck.

On average, if you look at customer reviews, you get x3-x7 or more from buying software per month.

The more expensive the software, the higher the profit will be

Everyone is equal here, and in this case a touch of luck is welcome. The important thing is not when you manage to find your first wallet, but what assets and in what volume will be there.