How do I know which animals are the best to domesticate in the future?

Hello! I am a college student who's looking to get into the business of breeding and selling animals in the future. I know a lot of people and businesses are able to successfully breed and sell dogs, cats, and other large animals, but I am hoping to start with something smaller and less common. I currently own a bearded dragon and I love how easy and cheap he is, and because I have more free time now during school, I've been thinking about breeding him and maybe selling his babies in the future. <br><br>Is there a certain market for the animals I am interested in? I'm not sure how to learn and research the market, or what websites are decent resources for learning how to breed and domesticate certain animals. I've been looking at the bearded dragon market in my state, and it looks like there is a decent market for them, but I'm not sure if this is the case for other reptiles or animals.<br><br>I am a reptile person at heart, but I am also open to animals like birds or insects if they have a decent market. Does anyone here have any recommendations for learning more about this topic, or where I should start?<br><br>TIA!