I'm mining Litecoin right now.
The whole point of Bitcoin and the other cryptocurrencies is that they are decentralized currencies. Yes, they can be used for shady stuff, but that's no different from cash.
The big advantage of Bitcoin is that anyone with the equipment (be it low end video cards or massive ASIC farms) can generate coins and exchange them for other currencies, goods, or services. Which is why the "mining" metaphor works well, as it's really just a matter of turning physical capital into wealth, just with a virtual currency being the output instead of a tangible commodity.
Currency markets have arisen, as well, for those who like to play the purely investment/currency exchange side without actually mining.
For me, Litecoin mining is just a way to put my hardware to use when I'm not using it. Whenever the cost of electicity is higher than the equivalent amount of dollars I'm mining, I'll stop, but for now it's not a bad way to pay for computer upgrades and coffee. I'm not bothering with massive setups, not that I have the time or money.