We might see the rise of multiple cryptocurrencies in our lifetimes that certain regions support at a greater rate than other regions. While people are pushing hard at developing machines capable of hashing more and more SHA256 per second per watt, perhaps the altcoins will see their hayday where people have been slow to the punch with bitcoin and mining and decide to focus on supporting alternative currency that they can participate in. So you may see China fully supporting bitcoin, while another country decides LItecoins (or any other altcoin) properties are most beneficial for it's economy. Cryptocurrencies are fascinating and it seems there has been a gigantic vacuum for the utility that the medium provide. $1,000/btc, no problem. $10,000/btc? Definitely. $100,000/btc? Bring it on 
The total amount of dollars and dollar liabilities around the world most likely eclipses $50 trillion; I've read somewhere the total lies in the quadrillions of dollars. With this in mind, I believe the exchange rate for BTC/$ will exponentially decrease until the dollar is made completely obsolete by unproductive monetary policy and ineffective/terroristic political practices domestically and internationally by the United States Federal government.
The total amount of dollars and dollar liabilities around the world most likely eclipses $50 trillion; I've read somewhere the total lies in the quadrillions of dollars. With this in mind, I believe the exchange rate for BTC/$ will exponentially decrease until the dollar is made completely obsolete by unproductive monetary policy and ineffective/terroristic political practices domestically and internationally by the United States Federal government.