Based on BTC's logarithmic trend-lines and price channels (shown in the image above), dating back to its incipience, I put EOY 2019 at a conservative estimate of $13K, a "more realistic" estimate of $23K, and a possibility of reaching (or even slightly surpassing) $130K, all determined by where the various historical price channel and trend-lines intersect with the 30th of December, 2019 (the conservative, realistic and possible figures are represented by the orange, red and purple horizontal dotted lines on the chart, respectively).

Considering that even the "conservative" estimate is almost exactly a 100% return on investment from the current level should explain why I'm so bullish on BTC.