Why would you do that? Then, there would be nothing to be spent by you.
Just invest those you think you can afford and have something left for yourself and for emergency purposes. That is not how investing should be. It is suicide. Actually this is a dumb question but I think you need some light.
Right, putting your all funds into bitcoin isn't a good idea. If you have money in bitcoin and you think it is enouh you should use it on your online transaction. If you put all of your savings into bitcoin there will be nothing to spend by you so you should save it in case of emergency.
Indeed, I don't recommend to put all of your money into bitcoin. You should leave some fund so you could use some money when the time of needs. However, you could convert your money into bitcoin and store it into your wallet then if you need money you could just convert it back into cash.