Lol it seems that it's exactly the other way around. More and more ICO's pooping up each day, just check the annoucements section...

It surely can' if you asked people a few years back if there is a chance it'll hit 1K they would laugh. Now it's almost there.

Pick 10-20 coins that offer something new and interesting. Do you thorough research, and follow those projects carefully. After some time you will have a better idea of which are more promising than the others. Buy the 5 most promising ones and wait for the big exchanges. Otherwise you are risking losing your money easily.

Does the work needed for the POW scale with the new block size or it has nothing to do with it?