I do see your point.. but even though it “isn’t an actual coin” it still has an increased value... tat the moment 5 times higher than $1. Therefore , it is good to have it.. not just to fight inflation, but because you can make profit from doing so.
For example: i right now hold 70SBD’s... worth $350 .. but in 2 days the price could very well go back up again to $10 a coin.. and be worth $700 instead. It happened before.. and it will happen again.

It is a risk to hold it... yeah... but it is a risk to hold any real crypto too!
Also, you can’t “?convert to steem “ but you have the market option to do exchange it too. Many of us don’t even use the other option anyway.. since it ends up being more expensive.