Now most of the people get awareness of cryptocurrencies advantages and disadvantages and they looking for the best source to multiply their money without any tax and hassles also the secrecy of investment. Investor's requirement is fulfilled by bitcoin and though bitcoin is the best investment in the year 2017 which make bitcoin all time high achieved and sustained also. All the altcoins are left behind bitcoin. I believe 2018 will be much better then 2017 for bitcoin investors.