Steem is more something of a backup plan that I really enjoy and helps me to achieve some goals in my personal life. (It is not really a passive income since I don't plan to lease out SP to bid bots)
I see myself as a semi-professional Sports Bettor and part of my income comes from betting on the Belgian Jupiler League where I am from. I use Steemit as a way to post my personal insights and previews on the matches while also keeping very close track of my personal betting results. This really works and helps to stay sharp all season long. I like to believe it also helps others to get a better insight in what it takes to be a winning player. (If you ever need info on teams or players from the Belgian League feel free to aks me about it!).
I am quite aware though that there are downswings and it is all far from guaranteed even though it has been my main source of income the past 10+ years. So having something that I enjoy and can potentially fall back on just in case I ever need to gives me more piece of mind. I do really like the new concept Steem brings and see potential in it so I do what I can to grow and help others grow aswel.