whats happen at 2017 make bitcoin rise up from 1000$ to 4000$???
at 2017 make bitcoin rise up from 1000$ to 4000$ and i think it's happen at 2017, people are get addressing with bitcoin, bitcoin archives good reputation at 2017 and get support enough to rise up from 1000$ to 4000$. and nowadays its getting more popular and it'll rise up a lot...