Advantage of investing bitcoin are; Highly Liquid in comparison to other cryptocurrencies, Greater volume, so chances of fraud are less, May provide Higher returns, Acceptable by many countries for payment purpose, Traded on thousands of sites, Transferable, It can be called as the deciding factor of the cryptocurrency market i.e. If Bitcoin falls, The entire crypto market falls & Vice Versa.
Some of the disadvantages are : Highly volatile and end up into a loss of all your investment, Affected by political and government policies, Affected by international market including forex market, Instances have been seen, where bitcoin has been used for the purpose of money laundering & illegal activities including terrorism.
In the end, I would conclude that Its the beginning of the new era and One who is a bull investor and have a postitive attribute towards it should definitely invest in it for long term to reap greater returns.