If the price goes back down again to around $4000-6000, people will be able to buy whole bitcoin, I know people can buy fraction of bitcoin, but buying whole is a better deal.
If you are planning on waiting for the price to go deeper, then I wish you luck.
It should not be seen as the affordability of Bitcoin but rather how much you can afford. That's the main purpose of Bitcoin's divisibility. If you'll wait when the price is leveled to the amount you can afford to buy whole then you might end up losing numerous opportunity of buying. We'll never know if ever Bitcoin will reach as low as the price you wish. So the best thing is to buy whenever you have some spare fiat to spend.