I like the concept of Steem and that guy pictured I think is the one that left Steem recently, so now its 100% scam free.
I dont think anyone should buy steem, but you can earn it if you are a content creator already posting stuff to youtube its probably worth making a Steem account and duplicating your work over there to try and get some Steem Power!!
Because I think its too niche. What Steem should have done (and this is strictly personal opinion, I dont know Steem that well) is create their decentralized social media platform and used an existing crypto to "fund" the content creators.
I believe Storj is doing something like this with storage instead of social media, and using Ethereum for the funding, but they do have their own token to, so I guess they will try and tether it.
It could do well though, I dont hate Steem with what I know about it so far. I dont like it enough to buy it though.