Actually, if difficulty goes up, the coin is more secure. That's debatable though because instead of 100 CPU miners, you will have 1 GPU miner. Some people will put up maybe a couple or a few of these, so 1 person could actually be equivalent to 200 or 300 CPU miners.

When everyone who has a 5 or 6 GPU mining rig starts mining this, then difficulty will go up.

After that, the exchanges will determine the price based on equivalent electricity expenditures of the miners because some or most miners will exchange their mined ESPERS to pay for their electricity and other expenses.

Like I mentioned earlier, I will keep solo CPU mining this coin half a day every day as long as I still get a block or two. Then I might consider joining one of the pools.

When there are too many GPU miners or difficulty is too high, ... maybe I'll turn off my CPU miner, as it won't be needed for the security of the blockchain anymore, and I'll be paying too much electricity.

Unless the price of the coin goes up. Yanno, something like more than 1 satoshi.

your site is up, but I get a error 500 when clicking 'send ESPERS' button...what happened?