Before any investment one needs to consider d interest rate an investment will generates. How much will a bank pay you per year? 3%? Bitcoin has jumped 10% in 2 days.
The second one is the matter of safety. Is BTC safer than your bank? I'd say that it is. It can't be taken from you by your government. Read what they did In Greece or Cyprus. You won't have to depend on them processing your transactions, it will happen automatically within minutes. In case of a crisis, a war or an epidemic you will have the money in your pocket and won't have to take part in so called bank runs.