Why? Because as this article shows, become famous on Instagram is a lot harder than you might think: I Tried to Make My Dog an Instagram Celebrity. I Failed. – The New York Times.
Yes, I know you are not a dog, but the same lessons will apply.
My guess is that the ship has sailed on become famous on Instagram. Same for podcasts and any other social media that has been around for a few years. You need to get in early, work hard, and take advantage of network effects.
If you do decide to become Instagram famous and manage to pull it off, please come here and mock me and I will update this post. 🙂