As a newly spouted thing, bitcoin has sustained its rapid development, stimulating industry investors' adrenal hormone. Killed or favored by so many countries, bitcoin derived investors puzzled as well as thrilled. The highly controversial bitcoin, once again, has faced several slumps. Will cryptocurrency become an effective means of hedge? No matter what the answer is, it has been severely hit now. In just 7 days, price of bitcoin has fallen by over 1,700 dollars, down 30%.