Bitcoin Could Hit Near $4,000: Goldman Sachs’ Chief Analyst   Although bitcoin price has grown 3x at peak levels this year, better gains are yet to come, according to Goldman Sachs’ chief technician.   Bitcoin has been on a historic tear in 2017. After ringing in the year at $1,000 on the very first day of January, bitcoin price reached an all-time high of $3,000 in mid-June. The remarkable rise amid an overall boom period for cryptocurrencies has seen…