Why we should patronize investment over savings is that investmet provides more profit than savings. Let's take for example you save money in bank for 3 years, instead of making profit your money would be gradually deducted bit by bit for maintenance, transfer or SMS fee. But in investment like Bitcoin, volatility in Bitcoin will make it to increase, except the volatility is a negative volatile instead of positive volatility.
Savings are necessary, there can be emergencies and times when you might need funds and you can't use funds that you have invested in such situations. Will you sell your Bitcoins even if they are at a loss if you face an emergency because you don't have funds for the emergency? You can't because that means you are wasting your money and instead of getting profit from your investment, you are getting loss and no one would want that.
So it's essential to have savings, you don't need to keep it in an account where you will be charged fees and stuff, create a savings account and keep your savings in it so that you can use them whenever you need to. If you can afford, have both, savings and investment funds, so that you don't need to use your savings for investment purposes.