If you have early res you'll be able to drive this car for a year and i'm willing to bet........ resale will be maybe a few thousand less than you paid overall. They won't be able to keep up with demand for at least 18 months.
I am generally doubtful that this will be the case. I think the depreciation will be commensurate with similar vehicles. That's what we see with the rest of the Tesla lineup. Early VINs typically take a slightly bigger hit, but it's in the range of "normal."
I wouldn't buy a Model 3 with the hope that depreciation will be limited. That seems like a path to disappointment.