as far as I think investing in bitcoin and bank are equally good, but for me it's still nice to save money in bitcoin than we keep it in the bank, because the opinion of the dibank is very low compared to bitcoin.
What is there to invest in the bank? Since you have been saving in the bank, has there ever been a time the banks really make you feel the worth of your savings but instead take away from you. The banking system has always been the most corrupt and it is just unfortunate that people are beginning to see that truth all over the world with this current evolution. I believe bitcoin is really going to make all of them pay for all their past exploits.
I guess we are still on 90's of internet where before internet wasn't too popular and many are doubtful with it. So few more years left and we are going to see it gain popularity and reputation and it will go through millennium of internet.
As bitcoin is still in its early stage, it must be too early to expect bitcoin replacing traditional banking system. But, it will happen how traditional mail communication was replaced by phone and email.