An old trading card i have is worth money
I just discovered an old Magic: The Gathering card I own from when I was a kid is worth over 2,000 USD. Should I sell it or save it for the future?
(I do not play the game anymore and have no desire to do so.)
Depends. If there are any immediate financial responsibilities that $2000 would be able to help like rent or credit card debt I'd sell it now. If you're okay without the extra $2000 then I'd hold onto it to see if the value doesn't continue to go up with time