Both are good investments in my opinion. Luxury watches aren't your typical expensive buy my guy, when you take good care of these you're literally looking at 300k profit by the lowest, also depending on the brand of the watch you're buying. It's also worth noting that these are tangible, you can wear as a statement piece, or you can just keep where you could see it to be a conversation starter. Bitcoin on the other hand, isn't so bad of an investment purchase either, just cause it's not tangible or it's volatile lol.
I think we should stop comparing apples to oranges here, if given the chance I know most of us will take both options knowing that these two could bring you money. Why choose one when you can have both?