Now Avraham was old, well on in years, and Hashem had blessed Avraham with everything. (24:1) Rashi says The numerical value of the word with everything, equals that of son. People spend their entire lives trying to accumulate wealth - have nice cars - beautiful homes - fancy vacations. At Hashem’s whim it can all be lost and they have nothing.
Or even if they do become rich - in their old age - when they try to figure out what they really accomplished they realize it’s all worthless. Avraham realized that in his old age he had everything. Rashi explains to us what Avraham considered everything. He had a son who was following in his ways and who reached great heights. That is what Avraham considered everything.