Okay look, I realize Bitcoin is a big deal nowadays but, just because somebody sends you a link and gives you $10 free... DOES NOT MEAN IT IS FREE, KIDS!
Do your homework read up on Coinbase and the things that they can do to your bank accounts and the thing you said other people can do to your bank account through Coinbase... NO BUENO!
This is your money your hard-earned income we are talking about-Do you really want it to disappear like *POOF* and there's nothing you can do about it?
Like I said do your homework and think this is my money I'm smarter than that and put it back in your wallet. Thank you and have a pleasant day!