in on the ground floor
US /ɪn ɑn ðə ɡraʊnd flɔr/
UK /ɪn ɑn ðə ɡraʊnd flɔr/

1.
초기부터 참여하다, 시작부터 함께하다
involved in something from the very beginning, especially a business venture, to gain an advantage
:
•
He got in on the ground floor with the new tech startup and made a fortune.
그는 새로운 기술 스타트업에 초기부터 참여하여 큰돈을 벌었다.
•
If you want to succeed, you need to get in on the ground floor of emerging industries.
성공하고 싶다면, 신흥 산업에 초기부터 참여해야 한다.