No advantages for the buyer or the seller?
For the seller, the advantages are almost instant settlement, and no cross-border fees if money is moving in between countries.
For the buyer, they’re almost always spending gains anyway, and it’s cheaper to pay in Bitcoin than to cash out what you need on an exchange, then pay the wire or ACH fees.
A wire is $25. A certified check is a few dollars. What would the exchange cash out fee be for that hypothetical $600K real estate deal?