Investing in Bitcoin and also saving money in our banks are two important things, you can't invest in Bitcoin and don't still have some save in your bank that's very wrong, remember you are investing with your leftover fund in bitcoin which is your discretionary income money you won't be needing for a very long time while the one in your bank account is the one you will needing anytime to sort out your personal needs by getting it back either going to bank or by going any point of sales POS joint to withdraw your money while you still accumulate Bitcoin and hodl so it is much important to invest into Bitcoin and also have some huge saves in your bank very very necessary.
Both are very important and necessary because you can't just move all your money into the bank without investing some with the anticipation of getting some return at the long run but if I were to choose between both then I think it would be investing it in Bitcoin because am sure of making some profit but if that doesn't happen I wouldn't be much worried because neither the bank would have added anything in terms of profit to money domiciled in my account, am speaking from an investors point of view.