7/24/17 update: The $420 high that remained nonconfirmed has now been breached on the move to $430 today, with no sign that higher highs are now needed.

http://bigcharts.marketwatch.com/advchart/frames/frames.asp?show=&insttype=&symb=gbtc&x=63&y=15&time=18&startdate=1%2F4%2F1999&enddate=2%2F18%2F2017&freq=7&compidx=aaaaa%3A0&comptemptext=&comp=none&ma=0&maval=9&uf=0&lf=1024&lf2=2&lf3=8&type=2&style=320&size=4&timeFrameToggle=false&compareToToggle=false&indicatorsToggle=false&chartStyleToggle=false&state=11