Team CryptoInsightfull 
I can see this question has been asked (and answered) before but I’m intrigued to understand some of the mechanism and how it works.
I received a cold call from a UK mobile number saying I had a bitcoin wallet held in Blockchain.com that had been frozen due to inactivity which I had created in July 2016 – the callers spoke with a European accent and had my name and email address. I was informed if I logged on to koinly.io I would see the transactions and value of my bitcoin holding. I have never set up a koinly a/c but the platform allowed me a password reset and then displayed a total balance of £172,024 of which there was £170,115 of unrealsied gains. Under transactions there were 2 deposits both flagged as Bitcoin BTC API. (API in red background)
Now I have never created an account on blockchain.com or a koinly.io account so everything tells me it’s a scam – and a cleverly targeted one but how have they created the transaction history in koinly, the URL is app.koinly.io/p/transactions so these transactions are being displayed on Koinly.io.
I cut the call off althugh they were pretty persistent in trying to call me back but there is a small part of me wonders if I’ve blown £172K!
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