Bitcoin is now 3 + times the value of gold. The IRS just lost in court. It is now federally recognized as a currency and not a commodity. If the transaction between 2 parties is less than $20,000 us currency equivalency it does not need to be reported for taxation.
Michael Novogratz and other billionaire investors have reported that cryptocurrency will grow to $5 trillion by 2020.
It is currently at around $110 billion in market cap. It is gaining rapidly in online purchases.