In term of stability i wouldn't say bitcoins are more secure then Swiss bank. The value of bitcoin can decrase easy while in banks the risk is smaller. In term of security it's depend how you see it. A hacker can hijack your wallet in a way or other then it will be a total lost for you. While if your bank get hacked then you get refunded as the bank is responsible
I think in terms of security the same applies, advantage for the swiss bank. Bitcoin is more vulnerable to hacker attacks and has less guarantees. But the point of bitcoins is to have a new technology that allows us to use a new way to make online transactions and to earn money online.
And there isn't any bank offering us chances like this to make fast profit and money online. What I mean is: Without a lot of initial money, swiss bank is worthless for you. Without money, bitcoin extend a welcome to you!
There is no doubt about that, bitcoin is much better than Swiss banks because it allows us to make money, but just to clear things out Swiss bank allows you to store gold.
So, you can exchange your money into gold and store it while the price getting higher and then exchange it back to money when the time is right, but that is still not better than bitcoin because you are going have to pay for the time it is stored.