turn into a Scammer easiest way , :p otherwise develop a genuine biz that can get you to success and heavy amount of btc..!
or you can pray someone makes a mistake sending to the wrong btc address. I was check my address and hoped that someone did that, but knowing me I would probably return it.
I will look into the wallet of the sender..! if its filled with btc and I got just a fraction of it then maybe i won't return but if the amount sent to me is huge for the sender then maybe I'll return.

Just Dreaming.