We were just talking about this on another forum!
Some watches do go up in value but not as much as they used to, they are just so expensive now, there is a limit to how much higher they can go in real terms. Also, there is no return on your investment until you sell it. You could have been buying and flipping all kinds of watches with that money.
More pragmatically, if you have a loan of any sort, any other 'investment' must be increasing, as a minimum, at the rate of interest you're paying on your loan just to break even. Then you've got to consider servicing. And insurance...
At a higher level, there are concerns like a slowing luxury goods market in China, and the fact that the Chinese now prefer omega to Rolex. Then the Rolex bubble starts to look just a little bit shaky.
At least there is no capital gains tax on watches!
On another note, I don't want to be racist but Malaysians are always looking to make a quick buck without doing any work. A few years ago it was swallow nest, then bubble tea, then cafe, then patisserie. Everybody jumps on a bandwagon and just kills an industry for short term gain. This is not just my opinion, my Malaysian Father in Law explained this to me recently.
Do you really think you can just walk into a shop and buy an investment? If so, why does anybody bother working? Use your brain man!