Don't judge a Bitcoin by its price
Bitcoin's price dropped in 2014, but so did the price of another unit in the midst of a thriving economy.
But take a look at the chart below. As you can guess, I've deliberately hid the axes and labels to obscure what this graph is about.
You can probably also guess that one of the lines here represents the price of Bitcoin. That's right. The darker blue line is the price of Bitcoin at the start of each quarter from Q214 to Q115. Short story: Bitcoin had a down year.
Yes, it's bizarre to compare quarters of Bitcoin to years of mobile apps. To that objection, hopefully you can allow that Bitcoin is still in its early going and working on a shorter time scale.
By the same token, the price of Bitcoin is a flawed measure of the health of the ecosystem. (Much in the same way that the price of USD is correlated with the health of the US economy, but can never serve as a direct measure.) A real assessment of Bitcoin's health would also look at a whole host of metrics in the Coindesk report that Fred points to, which portrays the Bitcoin ecosystem as maturing and growing. Take, for example, overall trading volume in from 2013 to 2014:
No one knows what the price of Bitcoin needs to be to support a vibrant Bitcoin ecosystem. Whether you're a Bitcoin optimist or pessimist based on its fundamentals, please at least be patient and take the long view. Even better, the nuanced long view.
¯\_(ツ)_/¯