cash in on (something)

cash in on (something)

To take advantage of or benefit from an opportune moment or situation. After the drudgery of working in an office for nine years, Catherine decided to cash in on an opportunity to work as a travel writer for her friend's new tourism agency. Although the market crash left many people with overpriced mortgages, some savvy homeowners cashed in on the chance to purchase property at rock-bottom prices.
See also: cash, on