I think Bitcoins are pretty cool. In short, bit-coins are a digital online currency. There is much debate among libertarians whether they fall into the category of “real money” but they are far better than Federal Reserve notes which don’t really fall into the real money category either. Bit-coins have been used on websites like silkroad, which largely sell illegal merchandise like drugs. This can be done because bit-coins are so hard to trace. The reason I like bit-coins the most is because it allows people to use currency that is outside the privately controlled Federal Reserve system. Its use alone is a protest against that system.
Here is a short video explaining bitcoins.