Sia will increase a lot this year, this is a sure thing .
They had a problem with the sc trasfers to the poloniex platform and bitrex and others. Some exchanges did not upgrade their wallet to new sia block (at block 130k aprox) because of that sc remained in sc block and not in the exchanges ( I assume) . Many users wait their sc back from the exchanges including me ( about 67000 sc) .
That and the ASIC miners are the 2 big problem that sc had ...but as soon as these problems get resolved siacoin will jump very high in price.