Bitcoin had a blistering first half of 2017. It rallied from about $1,000 a coin to a record high near $3,000 before finishing June near $2,500. It booked a first-half gain of about 168%.
The historic run for the cryptocurrency has prompted observers both in the tech world and on Wall Street to talk about the cryptocurrency being in a "bubble." its our time to be a millionaire in 2017
