Every thing is in development.
Internet and telephone make the communication easier for people all over the world. But postal companies still exist. There are many works they do.
Also, bitcoin can make the transactions easier for people. But banks will exist forever.
yes you are right bitcoin can be used for all kinds of transactions and it seems bitcoin is still there but it will start to decrease because it will if from the bank does not follow developments and do not follow the technology it will lose some of its customers because the customer is thinking more profitable if saving assets its in cryptocurrency like this bitcoin.