I have one cartridge copy. And the only reason I'd get another would be to help others achieve dream villagers. Even then, I wouldn't get it until Christmas or my Birthday.
It's nice to know how many towns people have! I have multiple games so that i can help people on the forums I got my 3rd this evening, which i know is a lot, but i think it's worth it. Plus, it's my money that i've spent, so i'm allowed to do as i please ^_^ Who know's i may give one to a friend in the future, i'm not sure ^_^
One physical copy but if I get some spare money saved on my Powerup Rewards card I'll buy a second copy. For now I'm happy with one as I'm busy lately.
I got my digital copy the day it came out, but I want a second physical copy.
I'd use the second one to put my knowledge of the game to use. I'd love to get the perfect layout for a town as well as a perfect spot for my house. (I took whatever layout looked cool and placed my house in front of a river, so I wish I could get a new start without restarting my town ;;n;;.)
Also so I can have one for Time Traveling and one to take Day-by-Day.