To expand on that, the money has to come to you through natural means, since magic works with natural energies. It won't just appear out of thin air. This is why when casting any sort of money spell, you should indicate how you want to get this money, making sure that the spell is to harm no one. Casting a money spell and leaving everything open to chance could result in you getting money from an inheritance when a relative dies, for example.
Magic is an aid that helps & guides us. Money does not appear out of thin air. Spellcasting can help you get a successful job, maybe increase your chances of good luck & fortune, etc. You have to be specific in your desires and how you want to achieve them. The universe will help you but you will have to do your own efforts to get to where you want to be.
How rich exactly? Billion dollars? Even with magick, that's unlikely. A few millions? Still unlikely. Somewhere in the thousands? Possible. Set your intentions to somewhere reasonable. That is the best thing you can do to make any money spell more powerful, and don't get too specific on how you want to get it and how much. An intention like
"I get 123,324.58291 dollars from my job at the new Pizza Restaurant on this street, this place, these coordinates of latitude and longitude, etc" will not be as good as
"I have 10,000 to 30,000 dollars which I earned in a year from my new job" or something like that.
Set your intention to a reasonable amount and know how you'll get that amount. This is important since spells could backfire with the wrong intentions. For example, you cast a money spell. Then you get a call saying Granny died and she left her 50,000 dollars worth of property to you in the inheritance. The spell worked! In the least expected and most heart-breaking way possible, that is. Set a clear, powerful intention and search up money spells on the miracle we call the Internet, and you'll have a good spell already
I can't say that any money spell will make you rich, but I have used them to win a few thousand dollars in the lottery multiple times. They do work but you have to find the right one. I did the little lottery spell from https://warlockmagicspells.com.