Of course not, in my opinion it's never late to invest in bitcoin! But in my opinion now is not a very suitable time for this! It is necessary to look in which direction the market will go in the near future!
Its not too late to buy bitcoin now. For me, there is no wrong time to buy bitcoin, every time is the right time, it just depends on the person, on how he/she can handle its investments. But before you invest, i think that you should study first its basics, about its advantages, disadvantages, its market, process, because if you know it all, you will know what to do, and you can be a successful on your investments.