Anything could happen. However, just reading the misinformation and FUD in this thread by Siacoin holders makes me want to buy more. It tells me that even people who have looked into the coin and "thought it over" still don't get it.
For one, there is no relationship at all between the coin price and the cost of storage on SIA. This is noted prominently for anyone who has bothered to read the details.
The team strikes me as serious and competent people with good intentions. I like that. Whether they will achieve what they have set out to do is anybody's guess. The SIA software is not exactly easy to use at this point. I can't even install it without errors. That's a black mark. And whether Amazon will run a steamroller over SIA or buy them out is another gamble.
But I think the coin is a pretty good bet at the current low price. In 2 years or so, it could bring a solid return. Or not. But I think it's a decent long term bet.