There are two good reasons to like this coin from a practical perspective:
1) Sia is an interesting cloud storage technology allowing people with spare disk space capacity to farm it out, see https://sia.tech
2) It's a miner's favorite because it can be dual-mined. Popular mining software such the claymore dual miner can mine both ETH and Sia at the same time without loss. So to those who mine ETH, ETC or another coin using the dual miner, Sia can now be mined at no cost. How that converts to market sentiment is hard to judge, at the very least there's and interest.
This analysis is not intended as investment advice.
Some positive volume showing on the 1h chart.