I don't think that we need to think about it much because at this edge we are not limited with the bitcoin in Actual because see it like a normal thing in our daily life like , a thing which is available in access amount will have low value because everyone can get it easily and another side anything which is available in less amount will will have more value , so with the both of these we can take into consideration that bitcoin is in limit and valueof bitcoin will be high instead to increase the amount of the numbers of bitcoin , so here we should not see toward the limitof 21 million in bitcoin data algorithm .
And second thing it interest as in bank will be surely decided by the limit of the value increase because it will not be easy for banks to control bitcoin's rate but still they can control amount of profit as a interest for the lenders with Thier own rules .