A lot of outsiders, like my mother, can't seem to wrap their heads around crypto currency. It's not a pyramid scheme if it's providing a service. Bitcoin, and Darkcoin provide a real service for real people all over the world. Cheap transportation of wealth from one point to another, above all else. It's the same service all moneys have provided since time began, only it kills the middle man (banks, governments, etc...) and keeps the movement cheap (very minimal fees are charged, if at all) and free from government manipulation. And governments are truly powerless against this new technology. Until fiat is extracted from the system. That is when a person/user enters back into the realm of Government territory.
Sorry for quoting myself, but I want to continue this thought and so many posts come up between.
So why does the price increase? And how far will the price go?
In very basic terms, you have to understand that 4 million coins for people to use is so few! Think of all the guest workers that send money home via Western Union at over 10% fees. Think of the incentive to learn to use this system! The poorest people are raped by businesses every day, yet they make up a huge percentage of the population. The biggest hurdle for these people is access. Converting fiat into coin. But this can easily be overcome by accepting payment in coin, or services (which would hopefully charge a heck of a lot less than WEstern Union) etc...
That's only one service sector.
coins also become a place to store wealth where government's taxation by inflation can't touch it. You risk the market price of the coin this way more. However, once the price of coins stabilize, coins will make an excellent place to store wealth. (already does)
And there are many other uses that will become more dominant, but remember, there are only so many coins, so many that will be mind over time, and demand will increase as coins become more accepted. This is truly the biggest technology of the early 21st century!