If you like Font Awesome, you're going to love Black Tie!
             

fa-btc · Unicode: f15a · Created: v3.2 · Categories: Currency Icons, Brand Icons · Aliases: fa-bitcoin

After you get up and running, you can place Font Awesome icons just about anywhere with the <i> tag:

fa-btc
<i class="fa fa-btc"></i> fa-btc

Looking for more? Check out the examples.