Bitcoin banking is more secure than normal banking, because you are the only one that has access to your personal wallet but in normal banking customer cares can login into your bank account without you're notice and use your money for any kind of businesses.bitcoin banking is more reliable than normal banking because money that is in your normal banking can be deducted or withdrawal without you're notice but that can not happen in Bitcoin banking everything happens with your authorization.
Why people is thinking that Bitcoin system is more secured than the system whereby bank system, it's because of they have Bitcoin at mind and secondly Bitcoin don't have a second party for investment is directly to the investors so i believe that Bitcoin have more security than the fiat currency system of banking