You can buy if you want now, but i would advise you to wait for bitcoin to fall even harder, because you can make more money that way. I think that bitcoin will fall very hard and that one of the altcoins will rise up and take over the place of bitcoin. So you can also invest in some altcoins. Lite coin for an example is the sleeping giant.
If you can afford to buy shoud buy now and if you want to have a bitcoin you should buy also and we all know having a lot of bitcoin can really help you to have a better future and have a lot of money. Lastly, buy now and become next millionaire in the near future.