in future there will be no banks ? our salary will come in form of crypto currencies

I doubt banks are going anywhere because they are so intertwined into the culture but alternatives will continue to come

Banks are doing pretty much the same thing, they've just been doing it longer. Money also only has value because we value it, it has no intrinsic worth. In fact pretty much all mainstream currency is completely worthless and is all based on debt anyway, promissary notes - a promise to pay. So in that sense at least bitcoin/Q whatever are not continuing a system of debt.