If you want to hedge your investment against the chance that the whole bitcoin thing might collapse into itself, I don't think any altcoins will do you any good.

Almost all the value in the alt coins is in comparisons to bitcoin. There might be fluctuations in the exchange rate that you can use to make money trading back and forth, but as it is right now only bitcoins has any real non speculation based value.

There aren't many shops in the real world that accept litecoins or dogecoins to pay for pizzas or sports cars.