This isn't professional advice, don't blame me if I'm completey wrong and the price of  Bitcoin crashes!

It seems to me like the price is low because of exchange problems. I think once decentralized exchanges are more user-friendly this will no longer be an issue, so long-term the outlook is good. If we assume the Open-Transactions Holy Grail is completed in 6 months, then I'd guess another big price increase (over $1000) in 9-12 months.

Short term I have no idea, I just invest based on how I expect the usefulness of a good to change over time.