Whats the best way to hold my coins for a long time ( lets say 6 months ) without touching it ?
Can i hold them somewhere save ?
If you tuck your coins away you will not be able to earn stakes and over 6 months it will become quite a lot of coins you threw away. Remember that GBT is not % based staking so it does not help to close your wallet or store your wallet away and bring it online once a while to get back-pay. You will get 2.8 coins for a stake whether you have little weight or tons of weight. After 6 months your coins will instantaneously hit a stake but you will get 2.8 coins and the weight will reset.
If you do not care about the staking, you can do the following:
1. If a paper wallet is available, send the coins to the paper wallet.
2. Encrypt your wallet with a password and store it on 3 encrypted USB thumb drives. Store the 3 drives at 3 different locations. Securely delete your wallet.dat off your computer.
3. If you setup your wallet.dat with a strong password and open it for staking on a reasonably secure PC, you should be fine. Just use a separate clean PC for this and dont use a computer with all sorts of software on it that you surf the web with and dont type in the wallet password too much on this PC.