Yes,it's safe. My cousin earned $2000+ money and they paid him with paypal and he bought a new pc with it.
Paypal is safest payment processor as well as you take some extra precautions such as - Never click any link in email which claims its from paypal (Spoof Email) - Always try to deal with trusted person (known person) - Keep your password safe
Paypal is great and secure, the only problem is when scammers use it, it can be annoying since paypal some times does not listen to your side of the story or sometimes does not back your side up and the scammer can end up getting his money back.
I have been using Paypal for 5 years and have never had a problem. As long as you never give out your password I think you will be fine.
Paypal is safe when used with extreme caution. I never have more than a few bucks in my account so that accidents don't happens. Every time I get more than 100 euros I withdraw.