Do you know about Bitcoin?
Its cryptocurrency. Absolutely anonymous currency it is.
U can buy it and use it for shopping on internet to get such things, which sellers likes to be inkognito.

There is another way to get some bitcoins - mine it.
You can use your computer for this, like anyone who wants to get bitcoin and start mining bitcoins.
But the speed of your computer will be so low that your profit in bitcoins will be usefull, until the course of BTC will grow up.
But you can buy some mining power (Ghashes) and get some profit instantly, profit will be strongly connected to number of Ghashes you have. And nothing else will blow your mind. Mine BTC and use it. So simple.
Here is cute and simple service of mining bitcoins. You can buy GHS and it will start work instantly, mine BTC.

https://cex.io/r/0/exelero278/0/

Also its mine another 3 cryptocurrencies - Namecoin, Ixcoin, Divcoin, but its price is to low now, until it grows up.
So simple to use.