I think that the Offline wallets better when you have a biggers sum moneys.
As usual, an offline wallet a good choice to become safe. Use an offline Bitcoin like Hardware wallet, cold storage refers to keeping our bitcoin completely offline to secure from the hackers and get many benefits.
Yes but I think it is also good that you have some btc on online wallets. Because when you need some small sum then you don't need from your off wallet transfer btc