The bitcoin price of $640 to $700 is still very cheap compared to the price in a few years, it is better to buy now.
That's right, we should take advantage of the price this days, for sure, it is costlier to buy one bitcoin after few years, there will always be an increase in price.. We are very lucky that we know bitcoin earlier, rewards and earning bitcoin is not yet hard, soon, it will also be hard to earn bitcoin, so we better buy now if we can..