I have few coins that do not have much value at the moment but they're around 80-90 years old (some of them) and right now there is no demand for them but maybe someday they might. I also have few watches(seiko rado) which are vintage and somewhat rare as they're not made anymore, they're almost 50 years old and still in a very good condition. So may be someday these might bring me something good.
How old does a coin have to be before it's considered old? I really dont know anything about coins, only have a few for the silver value.
Do they have to depict certain historical events or something to be considered collectible?
I think watches can be a good investment, I had to get one for everyday wear and found a cheap 60's Omega. At least it wont decrease in value like a new lesser name brand.