What’s Trending: The 5¢ spare coin that could be worth $15 … and the workout that might cost you your hearing

Coins in your pocket could be worth far more than you think. From a humble 5-cent coin selling for nearly $15 to rare Singapore pieces fetching 100 times their face value, could the spare change sitting in your drawer actually be a hidden investment? Then, we turn up the volume on another everyday habit: loud fitness classes. New research suggests the booming music in spin and high-intensity workouts can potentially put your hearing at risk. If louder music doesn’t actually improve your performance, why are gyms still blasting it? On What’s Trending, Hongbin Jeong and Nadiah Koh explore the surprising value of Singapore coins and the hidden cost of turning your workouts up to 108 decibels.See omnystudio.com/listener for privacy information.