Well, if we will be comparing these two, obviously bitcoin has the upper hand as it is made to take down the bank. With bitcoin, we don't need banks as we are the bank of our own bitcoins. In terms of security, banks and bitcoin have a flaw; banks in their security literally and with bitcoin being used by a human that is still prone from being hacked and put their bitcoins to high possibility of being hacked.
Now, who told you that bitcoin was created to destroy and take down the banks? Look at the people around us and how they are using crypto currencies. Most of them are just using it as a store of value instead of a regular currency. Most of them are using it for making profits. They cash out their profits in fiat! How do you expect bitcoin to take down banks when people act in this way.
Banks can't be taken down easily. At least not now.
Well, it is my own opinion. Users have the full control of their bitcoins, they are the one who is securing it, as the banks have with the fiats on their hands. With bitcoin, people don't need to rely on banks to hold for their currencies though there are those people who are still holding their crypto currencies on some exchanges which they shouldn't.