For something like SM as long as the game is still around and healthy in 5 to 10 years these Alpha and Beta cards should have some decent value. Maybe even more so for unopend packs if they could be proven to never been searched AND which is a big part there are still some huge cards out there to be found.
Something like MTG the boxes can gain some nice value over the years and people will sometimes pay more for the experience of opening an old back then what they expect in return. You also don't know how many of the big cards are even left. Which adds to the further mystery.
At least in the short run for SM you can leverage what you already own to acquire more of it. One day all those cards will no longer be dropping. While I'm sure the game will change a lot by than. The game could change so much some otherwise worthless card people can't even fire sell atm for a cent could be the true winner at the end of the day.
Some have already started to speculate and even bulk buy a certain card for one reason or another.
Biggest issue a lot of these cypto games face is the FOMA. Many of them are more created around the hype have a massive BOOM and then they crash into the moon busting. Once this space has had a the time to mature I have high hopes.
I just unlocked Explorer last night so here hoping I find a planet.
As far as non-crypto games I'll admit I'm having some fun still playing Game of Thrones Winter Is Comong. My completive nature has been sucked in by another browser game! Had some spender quite the alliance I was in for me passing him up because he found out I was f2p and he was not. Not quite sure wtf hes been spending on but he should been miles ahead of me lol.