Who knows? But the matter of thing is that bitcoin demand is getting higher day by day and it's value is also getting higher. The increasing graph of it's value is not stable. The value is increasing unconditionally and it is not comfortable for anyone. As we know that the bitcoin price had fallen many times in the past, so it's not pretty much sure that what is gonna be happen in 2018. A better advice is to save your bitcoins and wait for a comfortable time zone. Every rise has a fall. So we must mentally prepare our-self for the bitcoin future, any thing can happen.