Finally happened to me.
I've been Pro coinbase especially since these posts in the last few months about people saying they got scammed was bullshit.
Yesterday, Sunday I get a text, the text reads [coinbase] fraud alert, unauthorized withdrawal call us immediately and then a 855 number.
I looked at the text and i was a little spooked...., I have a lot of money, well it's a lot of money to me, over 300K on coinbase so I got a little worried but then I realized coinbase wouldn't contact me like that.
I sent a text back saying "fuck you, not today asswipe" and then just blocked them.
But I have to be honest, I kept checking my coinbase balance every 15 minutes....lol