I don't think investing in a watchs is a good idea, after all it is a luxury item and it tends to get cheaper after purchase.
Looks Like you Know nothing about Rolex Watches mate, but i also disagree on this idea, Diversifying our investment is Best strategy but instead of buying luxury watches that might at some chances will lose value , why not venture in Businesses? and also add some good crypto currencies to Keep holding.
Does Holding Rolex is much profitable than Buying Bitcoin? Remember that in 3 years time you can double your funds here like what happened from 2017-2020.