The term used for aiming too high for a particular goal is called being unrealistic. Unrealistic does not mean the goal can not be achieved rather then accomplishing the goal may be strenuous.
ambitious is not the answer
Demotivator
ambitious is not the answer
Demotivator
Demotivator
Demotivator
demotivator
Demotivator
It's called an aspiration.
Demotivator
Over-ambitious, dreamer, unrealistic.
ambitious is not the answer