As we all know that Bitcoins are the cryptocurrency that took the world by storm. Their prices gradually increased from 0 to 1500 USD by 2012. Since, then there was a small decline and right now as of 16-12-2015, it is trading at $450 increasing from $300 since past 6 months. It's more than 50% increase. Keeping this in mind, the Bitcoin is expected to reach $600 mark within 180 days from now on.

Since, there are limited bitcoins in the market, as soon the last bitcoin mined, there will only 21 million bitcoins and keeping in mind its market and potential, there will be gradual increase in its prices after that point. But, I cannot assure 100% on this, as in the case where its usage will be banned in the near future by international countries. 

For now, let's hope that doesn't occur. Bitcoin has huge potential yet to be tapped. We will come to know its potential in near future. As far as now, I will recommend trading and accumulating the Bitcoins rather than mining and Selling for cheaper prices.