Bitcoin means anonymity and no worries for a chargeback.
Thats why there is more scammer..
That's why you should do your due diligence, be wary of too good to be true deals and shady businesses, and use escrows whenever possible. If you do all these, the chance of getting scammed is very low IMO.
There are scammers on Paypal as well. Plus, you could also be scammed by Paypal itself, by freezing your account with some stupid reasons.