You're right, it's definitely not the safest way to earn Bitcoin, especially for beginners. It's very risky, but if you know what you're doing you can earn solid profit.
Other mentioned methods: Paid to Click websites (PTC) is the biggest waste of time. Maybe you can earn $0.01-0.02 per day. By using faucets and microtasks you also will earn only peanuts. Writing articles, blogs, providing services requires skills to earn something. Bitcoin lending requires to have initial capital. Mining requires big investments to buy hardware and it's not very profitable. And bounties sometimes can be risky because there are so many scams and at the end you may get nothing.