"Vertigo" partially refers to the nausea caused by observing a void, or large drop, with the overtone of the "calling of the void". Is there a similar word for capturing the feeling of strong pull towards deciding to "go for it", in the context of a soon-to-be-expired opportunity?
I think the expression seize the opportunity: may convey the idea: (from TFD)
take advantage of an opportunity when offered.
- My uncle offered me a trip to Europe, so I seized the opportunity.
- Whenever you have a chance, you should seize the opportunity.
also the sayings:
leap at the opportunity (to do something) and leap at the chance (to do something);
jump at the chance (to do something); jump at the opportunity (to do something)
As for a term to define the sense of urgency to seize an opportunity : (from Wikipedia)
- Fear of missing out or FOMO is a form of social anxiety, whereby one is compulsively concerned that one might miss an opportunity for social interaction, a novel experience, profitable investment or other satisfying event.
The phrase "(it's) now or never" can convey the sense that you must do something now because you will not get another opportunity to do it. Some examples from recent news headlines:
"It's now or never": Britons scramble for residency in Spain and Portugal ahead of Brexit
My health scare made me think differently, coaching Barcelona became now or never
Production linked incentives: India's now or never manufacturing moment
"Now or never": Heritage group rallies to protect 100-year-old fire station in Welland