Ever try to steal a house? The buying and selling process tends to be so comically onerous, involving numerous layers of validation, lawyers, realtors, fees, taxes, title transfer, it's worlds apart from comparing it to present day crypto currencies and crypto transactions. Real-estate being the majority proportion of all traditional physical property value in the world.
Maybe stray gold or silver coins or similar. Those offer more privacy than BTC though and are also quite easy to safely store (safety deposit boxes are cheap compared to any meaningful valuables). Or you can just buy GLD on the stock market.
Cash, at least in the US, offers a lot more privacy than BTC does. It also has low, stable transaction fees related to its use and existence.
Honestly, I think real estate chain of title, mortgages, etc is a perfect use case for blockchain. You've got lots of parties, lots of disparate data, and an onerous outdated process that makes transfer of real property take weeks to months when it could theoretically be "instant".
A city government is not the current decision maker when it comes to title of real property. Title of real property is complex and can be contested in court. There are various types of deeds involved in title and even then, you have to purchase title insurance in case some heir of an old estate comes out of the woodwork to claim title of said property. It's just not that clean cut.
