Maybe you can look this
https://bitcointalk.org/index.php?topic=1838770.0
I don't think that's right source to know what's the reason Decred rises. Here is their ANN thread OP
https://bitcointalk.org/index.php?topic=1290358.7880 Mostly the reason why a coin rises so quickly because there are some good news about that coin, or people wanna pump that coin.
Just lucky I invested some coins yesterday then all of the sudden just within overnight it pumps upto 90%. In my opinion its a good practice to "buy low sell high" from top 10 alt coins.
I wasn't lucky to bought decred when it was still 0.0017 btc.