I am still a little bit confused about that staking...

How often should i open my wallet for best profit:
1. Once / week
2. Once / day
3. Keep it open 24 / 7
4. Other
Thanks in advance.
You won't need to open your wallet, it will stake as long as your address has balance in the network.
dev,
I think you are wrong , I didn't get any stake when my wallet is closed.
guys,
How about you?seems i have to keep it open 24/7 if i want to earn the stake.
Most staking coins share the same code. I had yellowcoin not open during the high POS at the start and when I finally opened and unlocked it, it tried to stake 2000 coins or so which were not accepted by the network.
Leave it open.
Console: WalletPassPhrase YourPassword 9999999 true
this unlocks it for staking without making it insecure to the pc it's running on