When Kelly Mitchell, 56, had her Facebook account hacked by scammers, she didn’t realize that she had joined the group of nearly one million people who had been a part of ransomware attacks, phishing attacks, or data security breaches in the past year. In what’s become a more common trend, cryptocurrency and its growth has also led to an industry of scam artists looking to infiltrate people’s lives on social media with the goal of walking away with someone else’s money. It means that people, like Mitchell, must be more careful when going online, experts say. Mitchell, co-founder of Dallas-base…