optimistic

US /ˌɑːptɪˈmɪstɪk/

・

UK /ˌɒptɪˈmɪstɪk/

Tending to believe the future will be good
Confident and hopeful about future outcomes.
Having or showing a tendency to be hopeful and confident about the future.
Having or showing a hopeful feeling about the future.
Inclined to take a favorable view of events or conditions and to expect the most favorable outcome.

Examples

These estimates were wildly optimistic.

He's very optimistic about his chances.