Northwind has the best one yet.
It can work for cars as long as scrap prices stay high.
List the car on Ebay for breaking, as long as the engine, gearbox, etc are good. The body shell can be taken away by scrap/ breakers. But if scrap prices drop then ………… oh dear.
If inflation starts to increase sharply then even money in the bank becomes high risk, compared with shares.
If there was a way to double your money then it would only take 30 steps to go from £1 to £1000000.