As long as they're in decent condition, the value is going up. If you actually want to make money off of them, put them in protective sleves and wait a long ass time before you sell them.

Theoretically, cards of that edition (the older the better) will become more rare due to people losing them (accidentally throwing them away, house fires, etc) or will become more valuable because the good condition ones will become more rare. Thus, yours will be worth more.

I saw an alpha and a beta pack on ebay going for $800+ yesterday.

What is it they say about silence being golden?