I think there is a chance it will be used by a lot of people in that year but of course this is not sure without any doubts...
everyone in every country,its still impossible for now,need more time for it,and now that possibility might just 1%,and 99% it will not happen,in next 6 years bitcoin should adopted by poor people in Africa,Asia and many poor country,its hard for bitcoin to mass adopted in hard situation and people.