I think it's not too late, but it's also not the right time to invest in bitcoin. The value of bitcoin is quite high right now. As at the end of 2013, the value of bitcoin is quite good to invest. It is important that a good time to invest a certain coin.
Considering the fact that Bitcoin price is at approximately 50% of the all time high, I would say that it's not a bad time to invest. Furthermore, we are talking here about investing from a newbie point of view, and newbie trying to time the market usually doesn't end up well.
For those reasons best time to invest in bitcoin is now as those that think Bitcoin is too expensive at 45k will end up buying it at 70k