The time will also come where we will not talk about buying bitcoin, but instead buying satoshis.
Currently, with the price of Bitcoin, only a few people are able to afford to buy a full Bitcoin; many can just acquire units of Bitcoin, and that's okay by them. Only the wealthy are looking forward to buying one full Bitcoin. Anything anyone can afford can give you profit. Bitcoin has really grown up to almost that level that you are talking about now.
By the way, how many persons in the world can actually afford buying one bitcoin right now? Quite many of us bitcoin holders are virtually hodling some units and it's nothing wrong even if others get to only afford buying Satoshi in the future due to what the price might have been to buy then. What's important right now and perhaps in the future is that people should stack as much units as they can afford than not buying due to you not able to afford buying one full bitcoin due to price.