In practice that means selling the Bitcoin through a regulated exchange, documenting the transaction history and the resulting bank deposit, and letting that paper trail satisfy both your lender and your lawyer's source-of-funds check, the same review the Canada Revenue Agency expects for any large, unexplained deposit. A lender will not accept crypto holdings directly as part of a mortgage application the way it accepts a verified bank balance.
A buyer paying entirely in cash with converted crypto proceeds skips the mortgage step but still needs the same documented paper trail for the lawyer handling the closing, whose legal fees typically run $800 to $1,500, since an unexplained large deposit is exactly what anti-money-laundering rules are designed to flag.
The mechanics are more paperwork than obstacle, but they take real time to assemble, so starting the conversion and documentation early avoids a scramble right before possession. Get your hand-reviewed valuation from Joel Dyck.