For a lot of new people, btc is the door to invest in other cryptocoins, because there are coins that you can't buy in $ directly. Sia is one example, and I think is good and a great commitment with descentralized system.
But some good coins with low value are wrapped in btc/usd's rise.
Today 1SC (323 sat) is going to way to 0.01$ (≈ 0.00000505 btc).
But, for example, 1st of January 1SC = 23 sat and 0.01$ = 1325 sat (1btc = 755$).
Low value coins (in tens of sats) in other exchanges mean that there are more sites where to buy them, and it's great (
http://sia.tech/get-siacoin/).
However, it's the last opportunity to increase a significant value this year if btc doesn't stop to rise. If btc is going to rise faster than these coins, we will need to buy a lot of coins with a micropayment, and I'm not sure if it's so good.
Maybe, all cryptocoins need independence to btc like a door to invest.
I'm not sure if I'm explaining well or my explanation has a lot of holes that I can't see.

However I'm very enthusiastic with Sia, I hope this project will continue like now. But unfortunately, all great projects are linked with money. I hope Sia team don't lose their illusion. Some people are looking at their project with more attention than their coin. But we need SC to use SiaTech. Great circle.