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.
Investment of all money is simply a suicidal decision. At present bitcoin price is attractive to purchase, yet you can't assure that this price will not crash further. Any investment is risky. Thus do not keep all of your eggs in one basket. Purchase with maximum 50% of your fund and keep rest 50% handy for emergency purpose or rebuy to average price.