It depends on your current condition where you live and if you have a very cheap or free electricity source.
Financial freedom can be achieved if you know how to keep holding them and only sell them at the right time.

Using the mine coins for trading is very risky unless you have knowledge and skills in trading and if you also have free power you don't need to worry about the monthly electricity bill and risk of loss in trading but mining units have a lifespan we do not know how long your mining units can mine. So you must manage them well if you want to achieve financial freedom.