Sia is laying on a old support from last summer and is extremely oversold on the daily chart, like most of the altcoins. That would explain the sudden spike from today, that should continue until the rsi rise above 30.

But the most interesting for SC this year is that Nebulous are going to get it on the ground of real world usage, instead of focusing only on code-side development.
As stated by their road map:

Sia becomes production-ready for cold storage, begins to be used by companies, and introduces file sharing.