【コインマジックテクニック解説】コインロールのやり方・コツ | TANECOLE MAGIC

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Ranbir Arora on Instagram: "@topdeckshops turned a coin drop challenge into a money-making machine. The idea is simple: if you can drop a coin into a cup at the bottom of a water tank, you win free sneakers. Sounds simple — but the water makes the coin drift, so most players miss and try again. The result? A packed store, constant engagement, and more than €100 in tips daily. It’s a brilliant mix of marketing and entertainment — and a reminder that sometimes the smallest ideas create the biggest