Even though he mentioned that the house is secondary, that does not warrant him taking such a risk.
Bitcoin investment is best enjoyed with spear money that one can lock away for some years.
he thought that if he invested in bitcoin using the money from selling the house there would be more in the next year without thinking about the risks he had to bear and some depression when he panicked to see bitcoin going down.
Most beginners, of course, always hope that investing in crypto, especially bitcoin, is always profitable quickly, even though it's not that easy