A bank is a third person, which only complicates the whole process of transferring or receiving money between people.  With this, a significant commission is charged for their services.  Everyone understands that this is what banks do to themselves a certain profit.  But with the advent of crypto currency, such commercial companies lose their value in the financial world.  Who needs these inconveniences when transferring funds?  Why complicate your life, pay extra money and wait for a long translation time, if you can just solve everything with the help of digital currencies ...
 Such a state of affairs is understood by all the banking organizations of the world, which were so much in demand in the past.  Now their need is quietly going to second place, as more people are beginning to understand what crypto currency is and what advantages it gives.  And this is a big problem for banks, as this will make them incapable of further existence, due to their gradual exclusion from the financial system.  In connection with such financial freedom from the banking system, the leaders of various commercial organizations will continue to tell people through various sources of paid media that the crypto currency is a bubble that will soon burst.  That all this is a deception and a conspiracy.  However, already now there is a lot of evidence that the top guiding echelons of banks continue to unnoticedly buy up the crypto currency and keep it in their caches.  This is done, of course, in order to increase investment.  And this is worth thinking about ... Therefore, I am quite confident that the banks in the near future will leave the stage!

I have a few nuances that, although they do not say that the market will behave the same way as last year, but surely will prompt what will happen to it after a while:
 -The impact of bitcoin grows, which indicates a gradual realization by the market that the leading crypto currency is reliably protected.
 -Rally 2015-2017 was historic, but not unique in this ecosystem: from the end of 2011 to April 2013, the price of bitcoin increased 100-fold, and six months later-another ten.
 - Approval of bitcoin-ETF, even with a delay, could be a significant event, as it will make the asset extremely affordable for retail investors.  After the launch of the first ETF for gold in 2004, the price of precious metal increased by 350%.  The 2017 rally also caused a wave of corporate activity around bitcoin, and the promises of well-known banks, brokers, payment services and security service providers attract investors' attention using a value strategy.
  What also says that in the near future is unlikely to be a big increase in crypto currency!