Having the right yoyo for the right moment is what it’s about. The yoyo has to match the situation, the wardrobe, the surroundings, the surrounding activities, it must set you apart from the crowd but welcome the crowd to join you, it’s part of your persona and mystique. You need a bunch, way more than you think you do for this. I believe the proper attitude is when you believe you have enough you still need one more. Besides, all those yoyos that are laying around make great gifts and party favors.
Another thing is it would be terrible to walk across the room to pick up a yoyo or string. You need one on your person and another in reaching distance at all times.
Most importantly, consider how inhumane it is to leave so many yoyos unloved, alone in boxes on warehouse shelves, when there is room right there on your computer desk for another. It’s good to care! Give another yoyo a home, you’ll be glad you did.