We're only a few weeks from 2019 which'll be the final year of this decade.
The decade goes from 2011-2020, not 2010-2019.
So there are two years remaining in this decade.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.