The use of Paypal and credit cards destroy this trust by allowing a paying party to reverse transactions so the payee gets nothing. It's empowering a third party to arbitrarily negate charges.
Bitcoin is no more a "den of thieves" than a cash-based society, which most of the world was until recently. I'd argue that Credit Cards and PayPal are much more a den of thieves by abusing their trust to cause no end of issues for people receiving payments.