Usage patterns
〈事〉に将来性があるto have future potential (in something)
This field has great future potential.
〈事〉に将来性を感じるto sense potential in something
I sensed potential in his talent.
将来性豊かな〈人〉a person full of promise
He is a young employee full of promise.
〈事〉に将来性がないto have no future prospects
I feel this job has no future prospects.