It's Christmas day, I have a gift just for you,
if you figure out what it is, and here's a clue:
The gift is virtual, but as it's green like cash,
some say it has value, others say it's trash.
I think it's
The Green Checkmark (or equivalently reputation)
I have a gift just for you,
Only one answer can be accepted, so if correct the checkmark is just for me
If you figure out...
If we figure out correctly, we get a checkmark
Virtual... green like cash
The reputation gained is virtual, the checkmark is green, we can gain or lose points (reputation) like cash.
Some say it has value, others say it's trash...
Some users bother about reputation and fight for it (XP), while some don't worry about the fake internet points