The only area where Bitcoin can play an important role is where the inflation rate of paper money or printed money is high, while Bitcoin is not. Here you can hold Bitcoin as an alternative to paper money, but it does not mean that you will get a profit. Suppose you put $100 in Bitcoin today and you sell it at some point in the future, then by holding $100 in Bitcoin, you can get $90 in the future. But if you put $100 in the bank, you will get $100 in the future, but the value of the money will decrease due to inflation.
Bitcoin is relatively growing in terms of price and value because the world currency continues to increase as its circulation increases, for example, if you buy $100 today, it could become $90 if you sell it tomorrow or next week, but in the long run, the value will be different, maybe you will get $200 in the future, getting a 100% increase in price, which is driven by fiat inflation and the interest of buyers, but if you save it in a bank, you will get a storage fee that will be deducted every month and will also lose its exchange value against valuable assets such as Bitcoin.