Everyone that knows what's up wants to reach that goal at all costs, but only 1 million people (in fact, now much less since coins keep getting lost + current owners) will be able to make it.
Will you be one of them? I think I can do it but the price needs to stop going up. I was happy that the rally stopped since it just means I have more time to reach this goal, but I have a feeling we will be on 800+ soon once whales are done with buying cheap BTC. If it goes that high I think I will not make it in time.
It is entirely possible for a decent portion of the people here to get at least within a few BTC of the 21 BTC goal, and considering how many people are selling their Bitcoin each day I would say that maybe only 100k-450k of the 21 BTC slots are taken so far. While there are only a million spots (and like you say less with the lost coins), there is still a considerably high chance that you'd be able to get in on it before they're all taken.
most would agree if i tell you now is a good time to buy, since most expect the price to go up. anyway at a (current) price of $600 it would cost $12600 to get to 21 bitcoin. depending on where you live and your type of work you can decide if it is still possible or how difficult it is. to me it seems not to much, the question is rather if you are willing to invest that much in this technology.