A few weeks back I asked some questions on this site as to why I had a couple PCGS coins that are toning very rapidly. This has never happened to any of my NGC coins. So I did a little digging and I have seen and heard many complaints about the PCGS holders not being airtight. I understand PCGS grades tougher than NGC and therefore commands higher prices in the secondary market especially First Strike labels. This seems like a major problem and I havnt seen it discussed on this board. I dont know if I should continue to hoard my PCGS coins out of fear more of my coins will tone and ruin my collection. Should I be selling them now? I am fairly new to collecting and this really threw a wrench in my plan to hold my PCGS for the long term and eventually pass them to my children. Seems to me this topic should be more widely discussed if rare and valuable coins have the potential to change color completely. Its surprising that they would command such a high premium with this issue at hand. I havnt heard of this problem with NGC. Like I said I am fairly new to this game and would appreciate if anyone can offer insight. I would be happy to discuss this further with anyone who has an interest.