The great goals are much higher than the 15k for most of us that have seen the Bitcoin capabilities last year. I also expect to reach again to the 20k trough this year and maybe also higher. Bitcoin maybe doesn't have the best technology today because many new altcoins had come to the market that have promising plans and supreme technology but the popularity that Bitcoin gained through the years and global expansion that has been spread through the world so that every man knows what Bitcoin is for sure is influencing the Bitcoin growth.
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The situation with the Tether shook the market a little bit but nevermind. We are now seeing the Bitcoins rise to the top again.