I am envisioning bitcoin  20 years from now a leading  currency. Especially if  u can use it offline.. this time It may not be that popular to many due to some reasons..first it needs  internet some places dont have internet acces and secondly. Lack of knowledge regarding bitcoin.

  Personally for me.If you are financially secured already and you want to give all your time in doing bitcoin then I think there is no harm in quitting I believe that bitcoin is already stable. I know some people who are earning a lot  in bitcoin more than there  monthly salary quitting there job.