I have made plenty of money on Bitcoins, but please don't try to compare Bitcoin with the USD or the Euro in terms of "why is this worth something". It's a horrible comparison.
Right. Better compare it to gold.
+100
The exchange of bitcoin for fiat is pointless, we should start exchanging more hard assets, like commodities and bitcoin stocks, with it instead.
That comparison is still invalid.
There is a fundamental difference here: Gold can never be substituted for something else.
There are other metals: platinum, silver.
But these are neglegted, while equally suitable for the same function gold is used for. Same as LiteCoin. Gold to Silver like Bitcoin to LiteCoin.