There are stronger arguments in favor of bitcoin in 2016 than against it. 

The bear case: 1) Reputation;  2) Still no killer app; 3) Startups shut down -11+ bitcoin companies shut down in 2015

The bull case: 1) Stability;  2)Blockchain made its way into the zeitgeist in 2015; 3) Record-high VC money $315m of funding in 2014 $485m in 2015. 

The current market cap of all bitcoins, by the way, is $6.5 billion.