):- LTC because it is the scrypt coin with the highest market capitalization (plus: dedicated hardware is under development - if one believes what some say...)
- PPC because it has PoS with Bitcoin compliant PoW - might profit from Bitcoin ASIC miners that need some chance for positive ROI; long-term great chance to become important because of PoS
- NVC for the same reasons as PPC except for the dedicated hardware which is not yet available
- XPM because it brought the brilliant idea of generating data (while doing the PoW) that might scientifically be useful (or might not be, but at least I see a chance instead of dumb hashing ) to life. This might be the blue print for other crypto coins which try so solve problems with distributed computing while paying you for your computational power by giving you coins. Not every problem can be solved this way, but some np-complete problems might be...
As you can see I tried to spread the crypto money between coins that have architectural opportunities to prosper.
...whether they do it or not depends on people's perception and choice
