I do not think so. The function of banks and bitcoins are not the same either. But, what's the same is the circulation of money. You invest in banks as well as in Bitcoin, you earn money in banks as well as in bitcoin but it doesn't guarantee that bitcoin causes disaster to banks. I think, when you are going to look at it in a different angle, much people now invests in bitcoin than in banks. Apart from the fact that it is decentralized in bitcoins, more people nowadays prefer to handle their own money. In the contrary, people who wants to have their own business actually goes through bank to bank when you talk about the financial legalities. Therefore, it really depends on the people.