The idiomatic expression "to make hay" means to take advantage of a situation or opportunity, often implying that one is working hard or seizing an opportunity while it lasts. Full definition
That promises to keep investment opportunities hot for savvy market watchers, paving the way for strong sales as practitioners make hay while the sun shines. (realtormag.realtor.org)
The news headlines make hay of these swings, and investor emotions can ride along with the dramatic stories. (blackrockblog.com)
It is too valuable a gem to lose and simply pass over to other countries to make hay with. (educationbusinessuk.net)