Banks will be banks.. nothing can change on that and they are good in the industry so bank will remain but if want banks to be updated and cope up in the market they cant do anything but to accept that cryptocurrencies are now in the world .. and they will just accept and get into the circulation
According to me banks will be in the future but their will be a great impact of bitcoin on banks due to its high value and easy way of the transfer over all world and the cheap rate for the transfer in the world. also the value of the bitcoin is very high in the market which create a good environment for it to attract new people and they will make investment as a result banks will be impacted in the future.