I have one word here for you: independence. Everyone can be more independent using cryptocurrencies as a mean of payment. It's important, cause we are living in a world, where our every move can be tracked, and then recorded. Such data can be helpful for our society, but we all know, that huge data aggregators like google, or facebook aren't doing this to make our world a better place, but only (ONLY) to gain profit (money) and power. Cryptocurrencies can give you independence, maybe not from such stuff, but from modern financial system. There is a huge need (in my opinion) in our society to change economic site of our world. It's just too old, it won't fit to the future world, it is not good enough even right now.
On a general term, we need bitcoin to ease our payment method and ensure that digital payments is the easiest fastest and most convenient
There are some projects that are developing some solutions to bring cryptocurrencies closer to "normal people". And so on, you can pay with bitcoin for your house, for your bills, for your computer in many countries, due to a new law regulations. And for example, there is an altcoin,
FuturoCoin - they own two restaurants, where you can pay for
your meal with cryptocurrencies. That's what i'm talking about.