I am completely new to this business, but have already used some exchanges. Many of them turned out to be dishonest. Where do you store your bitcoins?
Bitcoin exists to prevent that third party requirement. In Bitcoin, the peer-to-peer network is responsible for keeping your money and you are the only one who can spend your funds by proving it using cryptography. You can depict that bitcoins' storage as blocks that contain information such as transactions, each one connected with the previous one, hence “block chain”.
If you're new to Bitcoin and you want to somehow keep your funds safe, I'd advice you to buy a hardware wallet. It's really simple and secure for a newbie. Although, if you want to learn more about Bitcoin, visit
learnmeabitcoin.com. I believe he explains everything wonderfully.