You have a good point, This is what i believe will happen, miners will and are getting discourage but where there is money, there are are sharks. (asic miner , btc guild) which will cover most of the btc created , making it useless for any normal person to earn any profit at all even if investing 2,000$ on hardware.
Exactly. Didn't realize though that if it is deemed too difficult (aka, people are discouraged from mining) that it'll become a bit easier to mine the next ones, etc.