I have found that in recent time btc phone scam has been increased a lot. Scams call people and pursue people to pay taxes and bills by btc or any altercoins. Even some asks to invest in fake coin also. Mainly the scam group target people over phone.
Has it been happened with anyone??
In my experience, I have not yet experienced phone scams basically because I am one of those who anonymously use bitcoin and noone knows that I invest in it and use it except from my closest friends. Also, I do not entertain bitcoin transactions thru phone because it is not safe and you do nit know for sure who is on the other line. But I believe that scams do happen because some people gives so much trust in this world full of opportunistic people. Bottomlin, do not transact thru phone and research first before investing especially in cryptocurrency market.