If you look at which stage iota is. I don't believe you are too late. It's crazy what they all plan to implement. So there is much time till you can be tooo late to invest in iota. :) But that shouldn't be an advice to invest. There are just my thoughts about it. There is always a huge risk!
If you wanna read a bit more about, what plans they have check this out:
https://blog.iota.org/iota-development-roadmap-74741f37ed01
RE: Iota too late to invest?