Prefer for investment is really depends on the needs of investors because if the investors want to safe keep only their money I must suggest to deposit on the banks because their money is safe and protected by bank insurance so we don't need to worry but if the investors are looking of a good profit in a short span of time I suggest to invest it on crypto currency because we have a chance of earning big amount of money in a short period of time but we need to be careful because we might also losing too much of our capital if we choose a weak crypto coin to invest.