There is nothing safe in this world, either saving your money in bank or even saving your bitcoin in cold wallet . If you wish for something safe then there is no such thing exist . However some people still on the thoughts that keeping your money safe in the bank is the best thing you can do right now
There is a certain level of security when you save your money in the bank. And it is covered in insurance at a certain level. It is not all covered but it is still insured at a certain amount. And that for me is security. If you are not well versed in protecting your bitcoin wallet, then saving in a bank is better for you.
Yes saving money is always safe and secure as banks holds an responsibility of your money and it anything goes wrong that banks will stand in your support and will help in recovering your money.