Why was mr white afraid of the second wish coming true in the monkeys paw?

Mr. White was afraid of the second wish coming true because he realized that the first wish, which granted him 200 pounds, came with a tragic consequence—the death of his son, Herbert. This made him deeply anxious about the potential repercussions of his next wish. He understood that the Monkey's Paw had the power to fulfill desires but also brought about unforeseen and often horrific outcomes, leading him to fear what the second wish could bring. His apprehension was rooted in the realization that some wishes may not be worth the price paid.