A good question therefore is what will sell more in 2018 Another one is what will sell less.
From all indications, info products will likely sell less, because people are increasingly lazy, and will rather have someone/thing do it for them, than learn to do it themselves.
Secondly, refund rates on info products is way higher than others. A few scum buyers also refund after they have paid. Its an evil cheat method.
Ecommerce is a rich niche, but the challenge of merch is high, and ads are evil
This leaves us with software (SaaS). the lazy persons best friend.
SaaS plays rolls in every niche you can think of, or have listed above. Just think about Russel Brunson and ClickFunnels, or Anik Singal/Jimmy kim and profitFox/SendLane etc...
If you need the perfect software and don't know where to start?
Go to saas1000 dot com and check out the top SaaS companies in the world.
Make your pick and headover to upwork to find someone create a smaller version for far far less.
If you are still scared, go to codecanyon. You will find many saas1000 listings already created.
So, back to the question, I think software is the future...no...scratch that. Software is the rave of the moment, and they that pay heed will smile to the bank in 2018.
cc: Ali Sofor