Originally Posted by rowan

You're probably thinking of BTC and its ever increasing difficulty.

There's a new scrypt altcoin (shitcoin) released pretty much every day. If you choose the right ones, they are profitable. You don't need to think about difficulty in 6 months because you will have moved onto another new coin long before then.

BTW, if you're only making $4 per megahash per day with scrypt you're not doing it right.