From a business perspective a religion is one of the best things you can start, it's free of taxes on most countries, it autoscales after convincing the first f

From a business perspective a religion is one of the best things you can start, it's free of taxes on most countries, it autoscales after convincing the first few people because it's now their (unpaid) job to convince even more; the demand is always there because most people have a biological innate fear of death/non-existence and just like with movies people crave a "happy ending", call it paradise, heaven or else; the best part is that the children of your believers are bound to be converted to your religion so there will be no lack of money donators on the long term, and is pretty easy to teach believers to denounce anyone that tries to convince them of leaving your religion as intolerant.