Choose the technology you know in and out, and are immediately productive with.
Choose the technology which is sure to be around in 5-7 years, preferably 10-15.
Choose the technology for which you are comfortable hiring the next 15 engineers.
This does not mean that you need to choose something unpleasant, unergonomic, or ancient. Neither does it mean that you need to choose exclusively among the top 5 most used in the field.
The key thing here is to avoid surprises, unknown unknowns. You won't have the time to learn from a novice level while building a new company.
A number of wildly successful MVPs were implemented with obscure (or then-obscure) technology which authors knew very well, and which boosted their productivity. ViaWeb was written in Lisp. YouTube was (and still largely is) written in Python, way before it was cool and well-known. The initial Rust compiler was written in OCaml.