If I'm understanding it correctly that is what I have heard called "chasing your three" and it's not a good thing, because you might shoot your "pointing" hand.
Instead, what I do is let my support hand wait around my sternum. Strong hand draws, pulls it upward in a vertical line, mates (that's the "three" position), and they press out together.
The "rule of three" is to only mate at the sternum, because inconsistently mating can result in accidents of varying degrees of severity.
Crouching or not has very little to do with it. You need a stable base (foot position and posture) and that is dictated partly by your terrain and position, but the actions of your hands do not change (unless you are shooting one-handed in which case you don't mate them, or shooting in a cramped space in which case you might shoot using very compressed mechanics in your upper body).