Real estate is fairly safe but if the whole financial system comes crashing down then real estate may suffer too. Gold would probably be safe also.
I would think Real estate is one of them but provided you live in it or it is in your vicinity so that you can keep checking the conditions and know that no other person has entered over their.
On the other hand gold is also a good option as you can anytime sell it whenever you need it and any amount vs for real estate it is not that easy to sell it.
CIVIL-WAR is coming, and in a civil-war the LAND becomes worthless and after the civil-war the WINNER's decide who owns the land,
Thus if you believe the USD/US-GOV is going to collapse and become an un-civil war, you don't want to go there, you need to be able to EXIT the USA, and that means with a suitcase, which only leaves BTC.
Long ago, a person could carry gold during an EXIT, but now they can see 'gold' buried from air-planes "remote sensing", its 50 year old TECH.
IMHO I would say GOLD & BTC, when I say BTC I mean eth, zen/zcash, dash,... any good high value/high market cap leader in each algo category.
The entire world is descending into ww3 and crypto-currency is the only way to "take it with you".
First advice would be to get the fuck out of the USA before the SHIT hits the fan, go live in some place like CHINA where owning gold is OK, and have BTC for insurance, ... if your rich, go to new-zealand, that's where all the rich are going now.
If your poor, and must stay in USA, then find some mid-western place and learn a trade, and keep your head low, the coming years in the USA will be hell, BTC is just a way to "MOVE" your wealth naked, as TSA will have body-scanners on every corner and civil-asset forfeiture will fuck you out of any thing your holding.
Study history of global civil-war's in history folks, owning real estate is the last place you want to be,
The way you make money on RE is to return and buy it for nano-penny's on the gold-dollar. Post Civil war.