First Point:
Don't sell your Genesis addresses for cheaper price, you must cry later. Because, some people sell their Minereum Genesis wallets between 0.25 BTC to 1 BTC (before MNE listing in exchanges). But present worth of each Minereum Genesis wallet is (32000 x 100000 satoshi - today's avg price) 32 BTC.
Second Important Point:
Don't purchase Genesis addresses from any one, because he is always have access to that address, as he know the Privatekey. You also cry later for doing this. So, be careful.
Conclude: If you want, purchase Timereum Tokens (available balance, not genesis wallets) only, from others.
But it is safe to wait till Timereum reach exchanges, to trade.