If you suspect someone has attempted to access your vehicle, take photographs of any visible damage or suspicious objects when it is safe to do so. Contact a qualified automotive locksmith or dealership if you experience mechanical problems. If someone appears to be targeting your vehicle or you feel threatened, move to a safe, populated area and contact local authorities when appropriate.
Ultimately, finding a coin near your car door handle is not proof of attempted theft. Rather than relying on alarming online stories, focus on practical precautions, such as keeping valuables out of sight, parking in well-lit areas, and checking that your vehicle is securely locked. Paying attention to genuine warning signs can help protect your car without causing unnecessary worry.