Big Moms potential

Would big mom be able to eat her own entire lifespan? if so, how much power would she gain? Just like we saw in Wano, she ate a year off her own life span resulting in a big increase of power, thatd mean she can eat more than one year and even all of her years. In this scenario, wouldnt she be able to become the strongest one piece character in its whole history? even if it kills her some time later