For me, I think the banks sucks because they tend to control everything, period!
The bitcoin is fast, secure, decentralized, gives total control and freedom to the people.
Perhaps, you had better experience with traditional banking system way better than bitcoins.

Share with us what you think? thanks

Banks have been there for a very long period of time and people will still continue to deal with them. I personally prefer bitcoin as it's interst rate is much better than any bank and the profit factor from it is much better than cash in general. I use banks mainly for savings and credit card expenditure.