Researchers have said some are fortunate to gain double their money while in grey markets. The only disadvantage for investors is you never know when your shares will start trading. It can take years before someone is willing to buy. The positive side of grey market is the fact that we have a chance to make a ton of money if this thing go our way. Who knows? We may see GMSC trading in the $1.00 range. You can never be so certain in Grey land. It's truly unpredictable.