Chris O'Meara/AP
- Jeff Greene warned the real estate sector and wider US economy are facing stiff headwinds.
- Consumer savings have dried up as higher interest rates bite, and construction has stalled, he said.
- The billionaire investor touted Big Tech stocks and Treasuries, and echoed Warren Buffett's advice.
Billionaire investor Jeff Greene just rang the alarm on the real-estate industry and wider US economy, revealed what he's betting on, and shared two of Warren Buffett's teachings that he's taken to heart.