If silver's main use in the future is for tech and the prices follows that trend, then premiums are just icing my friend. One thing i noticed around brixit time in the uk was that premiums were a higher percentage when spot was lower and a smaller percentage when spot was higher. If you follow that logic, then your thinking is sound and selling for silver spot is the exit selling plan :)
My knowledge comes many wasted evening's on the PC instead of playing with my silver stack, haha.