彼は一攫千金の夢を抱いて上京した。

tbd

He went to Tokyo with the dream of becoming rich.

He came to Tokyo with the dream of becoming rich.

多くの人が一攫千金を夢見て宝くじを買う。

tbd

Many people buy lottery tickets with the dream of immediately becoming wealthy.

A lot of people buy lotteries dreaming of wealth at one stroke.