Pam had visited a convenience store in her Connecticut town countless times but never noticed the cryptocurrency ATM until a man she had been chatting with online asked her to use it to send him money. He gave her detailed instructions. “They would tell me step by step, how to find the address of an ATM, what machine I was using and how to put my money in,” she said. So Pam, who asked that her last name not be used, would seek out these largel…