Bitcoin is the most talked about and top class security for transactions in the world today, where no third party has a hand and there is no chance of losing money.
Wrong, even if you have total control of your bitcoin, but if you don't know how to protect and you have a bad security hygiene, there are chances that hackers can get to you and steal it.
Bitcoin is accepted by more than thirty thousand organizations around the world like WordPress, Microsoft, Wikipedia, Overstock. Its popularity is constantly increasing day by day.
my own think
I don't know the exact numbers, but I would agree that it's popularity is getting bigger every day.