I was mining SC in dual with ETH, but know switched back to Decred. I don't believe in SC anymore.
I too switched to Decred as my secondary, and as of last night - converted a chunk of my SIA into Deep Onion coin.
One of the main dev's posted a positive note on their reddit group yesterday - seems to have helped the case some, but the fact remains that its a poor "make money" investment. Further, I can't stand the SIA purists that think wanting a profit from my investment is some sort of "bad" thing.
I'm still going to hold 15k in coins, because why not..
