It is not late, because sometimes bitcoin drops very hard so that is the time to invest in it. Now it is a bit expensive so if you invest now you will pay a lot of money while if you invest when its low you pay less.
You also get more profit by doing this rather than investing now.
I agree, It is never to late to invest or get involved with bitcoin because bitcoin will keep growing and that means that you can make money from it.
So if i was you just start investing and advertise bitcoin to some friends so a lot more people invest in it and we can make money.