With all the good news coming out in favor of bitcoin like
Expedia accepting bitcoin etc it's time to buy with the price going down. You will not be so lucky next week. I strongly believe it's going to reach $700 by end of next week!
For me it is the best time to buy bitcoin until its value is still in low condition, buy bitcoin now and hold it for a little bit of time wait for it to pump again and sell it a high value and get a huge returm.