Very risky. I would not recommend it. Although it is in the bank, it is better because you will have that sense of security that you have money when you most need it. Turning it all into Bitcoin does not guarantee easy access to money. It may grow in the form of investment but it takes too long to process and convert to cash. If you really want to invest maybe put in 30-50 percent of what you have in the bank, depending on your financial capacity and comfort and keep the remaining for emergency purposes.