A great man once said, 'If you love something, set it free. If it comes back to you, then it's yours, but if it doesn't it never was.' That saying is completely true. Think about how many times you've lost something and never found it again. Wether it be a TV remote, a flash drive, or a penny, they always get lost. And when they get lost, you have that one moment of panic where you can't find the thing that you really need. But where do things go when you lose them? Do they go to the Island of Misfit Toys, or someplace else?
You might think that everything you've lost is only gone temporarily, which it is in some cases, but in some it isn't. Eventually, you forget about it, so that object has no choice but to disappear and find somewhere else to dwell. That is, though, if it wasn't yours to begin with. You might have stolen it- which is a crime by the way- or gotten it handed down from an older sibling or something. Either way, it's not yours, which is why you can't find it. You can't find it because you set it free and it was never yours, so it left.
Now, if you set it free and it truly is yours, then you're in luck, because you'll eventually find it. It might have gone somewhere into hiding, waiting for just the right time to reappear. You might be packing up your room, ready to move into a different house or leave for college when you stumble upon this thing you haven't seen in ages. In that case, then the thing truly is yours, and yours alone.
The point is, everything that is lost will eventually become found, whether it be by you or someone else.