+1 agree that it is not money. However, if it was a pure commodity then it would necessarily require some (even minimal) use value, beyond an exchange value. Right now bitcoins have a 0% use-value and a 100% exchange value (eg, if they could not be exchanged for something else, they would merely be taking up space on our harddrives and are inherently useless, like random chunks of data).
Everything that have a value is money. Just like bitcoin, it also money the diffirence is it is digital currency but you can also exchange to real money but its expensive one to exchange. But you can also used it online by buying your needs in online shop or paying bills.