The recipient received a cold call from a UK mobile number claiming their bitcoin wallet held in Blockchain.com was frozen due to inactivity.The caller had the recipient's name and email address, and instructed them to log onto koinly.io to view their bitcoin transactions and value.The recipient had never set up an account on blockchain.com or koinly.io, leading them to believe it was a scam.Although the caller was persistent, the recipient cut off the call, but had a brief concern about potentially losing £172K.