Is the Porsche 911 a good investment?

The thesis

The 991 R married the 500 hp GT3 RS 4.0L flat-six with a six-speed manual, no wing, and no roll cage—exactly what purists craved. Just 991 built. The market peaked above £870k during the speculation bubble but has matured around £330k–£550k for top examples. The introduction of the GT3 Touring deflated the scarcity premium. The 911 R is late-cycle but stable; a great driver's car priced fairly, not a screaming investment from current levels.