No it is not too late, although if you have waited this long you may be sad because the price did a x4 in just this last 8 months. I believe in time a 10k bitcoin is not very hard to achieve so no it's not to late, not this time at least.
I dont think so. Bitcoin price is now very big and it has a high demand on the market now. So if you buy its good because you will earn a lot months from now. So i think it is good to earn bitcoins or buy now.