Yeah, these estimates are way off. This means that according to EA, xbox one only sold 3 million units in 2017, when it sold more than that in the US alone, according to NPD numbers.
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.