If you're collecting something or things for your personal pleasure that's great.
But if you're hoping to see an appreciation in monetary worth keep in mind that very few "collectables" increase in value over the long run.
If you're collecting as an investment as well as pleasure do your homework, and keep in mind that many things that were very much desired by previous generations have become passe, with very little demand today.
Foe example most art by not-established artists, most automobiles with a few notable exceptions, antique furniture in general, almost all jewellery except certain watches.
I used to collect electric guitars. A few Fenders and Gibsons I had that were made between 1955 and 1965 appreciated in value a great deal, peaking in about 2008. Any guitars i bought that we were manufactured later than that were always sold at a depreciated value, though I did have the pleasure of having them and playing them. Thankfully the profit I made selling those earlier guitars in 2008 through 2010 more than made up for that.
But believe me even when I was buying those old Fenders and Gibsons, starting around 1981, I put in a lot of research into what market prices and trends were, and learned how to make sure I wasn't getting scammed by the vintage guitar dealers.