I remember how in the early 2000s there were popular advertisements that sold "magic" minerals. They talked about the incredible properties of stones that can cure many diseases. A beautiful lie, but many believed it, alas.
Personally, I have not studied the healing of certain minerals. I heard many times that there are stones that bring good luck, improve health, even "magnetize" money into your life. I can not judge whether this is really so.
But I think that this is a good business. If we regard these crystals, minerals from the etetic point of view, they are beautiful. Many of them can be an excellent decoration.
Hobbies first of all should bring pleasure. If you work all day, this is a full-time job. The concept of a hobby is no longer relevant in this case.
Thank you:)