Because SIA is now opensource in ASIA, and the Chinese miners are harvesting the profits of the opensource...
Exchange market for SC is quite depressive
For now at least with the amount of miners raking in and dumping no doubt will find a bottom and eventually go up. If the coin survives and people buy into it and it gets adopted and used no doubt am sure it can make a recovery. Not sure how Decred has been or was when it first hit dual mining no doubt hit a dump wall down trend and went back up...
Market Cap $ 10,032,285 =15,480 BTC
Volume (24h)$ 546,036 = 842.55 BTC
Available Supply 16,200,989,994 SC
Compare that with Decred thats one hell of some movements over last 24 hours. Time will only tell to see where it lands and bottoms and if it will survive.