1) Miners (2013-2014)
2) Exchange (2014)
3) Investissors (2014-2015)
4) Merchands (2015-2017)
5) Peoples (2016-2020)
and then, after all... -5 years-
6) Salary (2025)
7) Goverment (2028)
4-6 are already happening but i think meuh6879 is talking about gneral public, wide scale access to bitcoins. as for 7 i would not say governments, but local townhalls/councils/local authorities will offer crypto.. research "new hampshire project" and "Hullcoin" for examples of what i call local authority access to coin