The attraction of bitcoin is that it cannot be influenced by any government, whereas for all common currencies, the central bank can just print notes (leading to inflation and loss of worth of your savings). As such, bitcoin has my support.
I came up with this simplified history of money (correct me if you know better):
For thousands of years, a coin was worth the amount of metal (usually gold, silver, copper) is was made of.
Then governments started printing money with the promise to exchange it for a certain amount of gold any time.
The convertibility of USD to gold (1 ounce of gold = 35 USD) was abandoned in 1971, from then on, banknotes were just printed paper.
And with the next step, either bitcoin or abolishment of cash (plans by many European government to control money flow), you have nothing, not even a piece of printed paper. (Technically, you have some electrons in memory chip.)