I'm saying as an investor, collectibles are very difficult and highly speculative, and the friction makes them even less attractive. I disagree that buying old, consistent collectibles cannot themselves be speculative - if you wait for the right moment they can make significant returns. But the downside is significantly reduced if you restrict your investments to something that has been consistently valuable across the longterm.

If you are into something, buy all means buy it. I just mean if you are a dispassionate investor looking for a return it is a pretty poor area to invest in. But if you like something - art, pokemon, whatever - just do what you love