I was reading the Speculation section from the Economics forum yesterday, and two guys from the BTC Foundation said that 2018 will be the last time that Bitcoin will be under $10,000. I believe that this statement was made to lessen the worry that comes about every time that BTC drops. I don't know how anyone could make that statement in full faith though, as the nature of altcoins is its very volatility. Since it is not tied to normal economic conditions as fiat currency is, I don't quite see where that prediction comes from. The fact that many economies are talking about some type of oversight does show that acceptance is gaining and perhaps is a harbinger of more stable, and higher, prices.
There are many speculators gave their opinion about in bitcoin, and most of their speculation didn't happen, and if there is some prediction is not that accurately close to what happen in reality. But I do believed in one bitcoin experts that in the year 2025 bitcoin will become 100K$ each by this year. It is more like realistic to be happen.