Just in case someone doesn't know - until the Bittrex issue is clear (if MYST remains there or not - as I see it it will be gone there by the end of January)
People who think "I better sell" can instead simply store their Myst in the MyEtherWallet com Etherchain.
Then simply Hodl - project too good of an idea as to just sell due to the exchange issues.
If one is an investor, just put the MYST tokens in a wallet and revisit it after a year. Or wait for other exchanges that will list Mysterium. There are many good enough exchanges out there that can be beneficial to Mysterium.