You can find that for altcoins but not for bitcoins. I think everybody will be aware if there is a possibility of staking bitcoin, and if there is I would want to know about it. Any site claiming to be able to do this would be be a ponzi scheme without a doubt. Still, I agree that staking alone is a feasible way to make cryptocurrency to work for us but lending out or doing business as a sleeping partner are few other possibilities for making our coins to earn for us.