How do I make myself believe I'll earn £500,000 next year? Listener question

How do beliefs change? I hear about people doing "belief coding" which seems both ridiculous and sensible depending on how it is looked at. I guess now that the limitless nature of things has been glimpsed....the identified mind is looking for ways to open portals...but also there must be a logical way to do this...maybe? How do I make myself believe I'll earn £500,000 next year???