That depends on when and what type.
'Housing' can get to a bubble where when there's a correction people can be underwater having to climb their way back out. We could easily be in that bubble now.
'Commercial' is gonna take a hit because of covid. Many businesses haven't seen much drop off with people working from home and need less office space going forward saving them money overall.
'Vacant land' has always been a good investment for me. It can be a long term hold though. I got 4X my money on the last piece I sold but I held it for near 25 years to get there. Low risk, but I could have made the same money (or more) in the stock market in that time.
Precious metals are always good to accumulate when the stock market is roaring. Not so much when the market is in the shitter. That's when peeps are selling what they've been accumulating.
Never invest in anything on momentum and hype. Buy shit when nobody wants it. You don't want to be the guy left holding the bag.