You say it is true, we all had to see if in know 2017 yesterday is the triumph bitcoin, and maybe in year 2018 is also will be the year bitcoin I was sure that bitcoin will also ranked first as money crypto termahal in year 2018, and no coin can drop bitcoin, but if in 2019 I doubt if bitcoin will still be coin most expensive and coin of the most popular.
Staying 2019 will be the year for BTC as you write BTC is ranked first and will always be ,so please don't hesitate on the privilege of BTC and hodl better than selling now.