atleast no one will know how much I have or worth.
How do you buy your Bitcoin, through centralized exchange that will require P2P and you will be sending fiat from your bank to purchase the Bitcoin. Banks calculate your total deposits and withdrawal for each month, if you're trying to escape the part of banks knowing how much you worth using accumulated balance for each month they can easily detect your worth.
What about you? Apart from the money that we can make holding Bitcoin what else have Bitcoin did better for you?
Obviously money, i can't think of using Bitcoin for some other things but the only aspect has always been for profits. My fiat is always working for something, either business or investment, no need of keeping fiat in my bank for no purpose.