How deep could this thread go before someone points out that there's no use for the coin?
That's not true!
Litecoin, and other scrypt coins are absolutely useless.
Primecoin finds prime numbers, which can be useful for science. It also verifies blocks faster than SHA.
Yes but that's not a use for the COINS.
Mathematicians may run primecoin for the fun of it, or for scientific value.
Miner, traders, and normal people are going to stop running it at some time if there's never any use for the coins it generates.