I'm not betting against Bitcoin bouncing back if it does dip below $5000, but I wouldn't be so irresponsible as to risk my home either. If you're willing to lose everything for the prospect of doubling everything, then you're essentially gambling, and irresponsibly at that. Do you like gambling?
If you can afford to lose your house, you can do it, great profit comes after great risk; if you cannot afford to lose your house, don't, never invest more than what your are willing to lose.
He wouldn't be selling it for Bitcoin if he could afford to lose it lol.