Has anyone invested in top end Rolex watches before? I've heard people say that genuine Rolex doesn't depreciate over time but in fact increase in value as they age.
How much profit will you get from these watches, say if I sold it off in 5-10 years time?
Less than if you invested in something that makes money (dividends as well as capital growth, not only capital growth), like shares.
There are occasionally asset classes like classic cars, gold bullion, coins, artwork, Rolexes that will outperform more traditional asset classes by significant margins, but it is usually difficult to tell when that will occur. Usually with cars buying in a recession leads to a tidy windfall once economic activity has picked up.
Because Rolexes are internationally tradable, they can act as a currency hedge of sorts.