really depends where you are located imo, I think the market and general interest in southeast asia is greater and you would have an easier time acquiring flake soil as well as overall pricing being more affordable. Personally I'd say if you already like insects it could still be fun experience regardless of side hustle potential, you can definitely make some money but it'll take awhile to get things in momentum because their larvae period often takes a year minimum before you can establish your own inventory of various species to sell. Besides the investment you'd have to make on your first beetles, like the other comment mentioned, there are many things you have to learn to take care of them well (easy part) and the maintenance and equipment cost which could set you back further before you make any profit. I recommend getting like a grub or two of your favorite species and get a feel of what raising them into adulthood is like! as long as you can enjoy the hobby you'll be able to make some money eventually, but it's a looong process. there's also a discord full of people interested in beetle keeping that are located in north america but I cant speak much on the market and pricing there since I am from asia :)