Giving value is the basic concept to generate income, even in passive income. Based on this, the point of passive income is not constrained by time. For example, your digital products uploaded online are delivered to your customer anytime, and putting money on stocks or index funds gives you a return without physical labor.
Jacob saw the ladder that stretched from the sky, and the angels of God ascended and descended on it in Genesis 28. Then, what does the ladder means to believers? It is meant the end of the ladders is the entrance to Heaven, which everyone is curious about and wants to go to.