well the difficulty is already increasing very quickly right now, but what will happen if the BabyJet and the monarch get shipped :S I'm afraid mining with a device smaller than 100GH wouldn't even be really profitable anymore
Well, you have a point, but here's a few thoughts of mine:
1. I (at least) got into mining as a hobby, as I like the IT and technology aspect of it. I'm not really into it as a money-maker.
2. I know people who fly remote control helicopters & planes. Those guys can drop $5K easily on a new aircraft. Me dropping <$3K on a miner isn't much different.
3. Even if difficulty goes vertical, and TH/s are added to the network, i'll still be generating coins, just not nearly as fast as I used to.
4. BTC/LTC price can do anything at this point. Most countries haven't adoped a pro/con stance for/against BTC yet. What happens if/when it becomes widespread and prices jump?
5. If #4 becomes reality, wouldn't you rather be sitting on coins you mined rather than having to start mining anew?
Just a few thoughts... maybe my predictions are optimistic, but crypto coins are really a new tech that hasn't truly seen acceptance yet. Granted, I havent been mining since 2011 or anything, but I think we're still on the ground floor and the only way is up at this point. Sitting on your hands and waiting isn't going to help.