A French mother & her crypto trader son discovered they were being surveilled by folks planning a wrench attack who had placed a GPS tracker on their car. They alerted police, who set up counter-surveillance & arrested 5 people before they attacked.

https://www.europe1.fr/Police-Justice/info-europe-1-cryptomonnaies-les-enqueteurs-dejouent-un-nouveau-kidnapping-en-normandie-759929