By the end of 2018-

• Michael Novogratz - The former Fortress hedge fund manager predicts that it might reach $40,000.
• SAXO Bank predicts it might crash (later in 2018) but reach up to $60,000 before crashing.
• Dav Chapman - The CEO of Octagon Strategy predicts it to reach up to $100,000.

Whereas,
Tom Lee - A wall street strategist expects it to reach $25,000 by 2022. As it reaches nearly 18k last year thew 25k prediction sounds just okay but there are chances that it would occur earlier.
From the above "predictions" bitcoin by the end of 2018 could be anywhere between $25,000 - $100,000.
HOPEFULLY.

Bitcoin has been fluctuating near 8k for a past few days. It was similar last year around November when the price was fluctuating from 6k to 9k and then it boosted up to 19 k in the next month.
This is the chart of a few days-

This is the complete year's chart-