The expectation or act of getting a large fortune in a single stroke (a 'get-rich-quick' scheme); often used for lotteries or speculative ventures and implies high risk.
宝くじで一攫千金を夢見る人は少なくない。
Many people dream of striking it rich with the lottery.
SNSで見つけた投資話に一攫千金を期待してお金を突っ込むのは危険だ。
It's dangerous to throw money into an investment found on social media hoping for a get-rich-quick result.
起業して一攫千金を狙うより、堅実に成長させる方が現実的だ。
Rather than aiming to get rich overnight by starting a company, it's more realistic to grow it steadily.
彼は一攫千金を夢見てギャンブルにのめり込んだが、結局すべてを失った。
He obsessed over gambling hoping to get rich quick but ended up losing everything.