כִּ֤י יִרְאֶ֨ה ׀ חֲכָ֘מִ֤ים יָמ֗וּתוּ יַ֤חַד כְּסִ֣יל וָבַ֣עַר יֹאבֵ֑דוּ וְעָזְב֖וּ לַאֲחֵרִ֣ים חֵילָֽם׃
Tak obaczy! Mędrcy umierają, społem głupi i ograniczeni giną, i zostawiają innym mienie swoje.
Ibn Ezra
this power that is, riches (as in, “they shall leave their wealth [literally: their power] to others” [Psalms 49: 11]), in the sense of: the fruits of their toil, and of their strength.
Rambam Introduction to the Mishnah
When he gathers all of the golden coins for which he sold the strength of his complete soul and he [acquires] a portion from them, he begins to divide them among the craftsmen to build him a foundation upon the [bedrock] of the earth with plaster and stones in order to put up a wall upon it that will stand many years. And [yet] he knows that there do not remain in the years of his life that which would wear out a building made from reeds. Is there [any other] idiocy and lunacy like this?
Rashi
חילם means THEIR WEALTH. Examples are: (Deuteronomy 8:17) “hath gotten me this (חיל) wealth”; (Numbers 19:18) “and Israel acquireth (חיל) wealth”; (Psalms 49:11) “and they leave (חילם) their wealth to others”.