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.