a fool and his money are soon parted

Proverb

Japanese Meaning

愚かな人は手に入れた金を長く保つことができない。 / 愚か者は自分のお金をすぐに失ってしまう。

He invested in every scam he saw because a fool and his money are soon parted.

彼は見かけたすべての詐欺に投資した。愚かな人はお金をすぐに失うからだ。

Sense（1）

It is easy to get money from foolish people.

Sense（2）

It is difficult or unlikely that foolish people maintain their hold on acquired wealth.