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!
Right now is the best time to invest on cryptocurrency because the market price is currently dropping and it was guarantee to earn profit because the market prices will still go back to normal after a few months.
Do it now! Later you will not have this great chance to get the crypto for less. Still, the prices on the market are very low, and we have to use this time for investments.