Hi guys, sorry for my question. I own some NEO on the exchanger but I'm looking for a way to store them somewhere for long term. Which is the safest one?
Me too - the best thing is to stake your neo in the neon wallet and receive free gas - unfortunately the neo website won't load atm.
Can someone tell me do you need the neon wallet open all the time to receive your gas?
You do not need to keep any of your NEO wallets open at all to receive GAS. You can stay offline for any number of years, come back later and claim all generated GAS over that time period if you would want to. Owning NEO and storing it at an address of your own is enough to entitle you to the generation of GAS. The specialised bookkeeping nodes will keep the NEO network running. Keeping NEO at Binance or Kucoin will also entitle NEO holders to GAS, but not if held at other exchanges currently. Keep in mind though that generally holding any cryptocurrency at an exchange is the least safe option available.
The safest way to store your NEO would likely involve the hardware wallet called Nano Ledger S. NEO support for the Nano Ledger S is almost entirely in place, but I would wait for confirmations for that. The next hardware wallet that will have NEO support is Ledger Blue (if you are willing to wait longer and do not mind the price tag).
What you can also do is ensure you leave no wallet files or private keys on your computer (but make backups that are not connected to the internet) and ensure you have a good anti-virus program and anti-malware program which can be something like Avast, Malwarebytes and HitmanPro to ensure there is no malicious software on your computer.