too many large exchanges = too much downward pressure. you need to keep in mind that the majority of miners just want to MINE AND IMMEDIATELY SELL. The collection of people on here and reddit and in other places who are fanatically positive about this coin (and other coins, it's not just potcoin) are the minority. If more people would legitimately HOLD then coins would rise faster and more steadily, the problem is most people talk the good talk but in reality the second it goes up a few ticks they are unloading coins like crazy trying to make sure they cover their electric bill, their mining rig investment costs, etc. no one wants to be left holding the bag if the whole scene collapses.