One thing people forget, or just plain do not know, is that Bitcoin has "smart contracts" (at least it had them when one BTC was around 0.2€ ... haven't check

One thing people forget, or just plain do not know, is that Bitcoin has "smart contracts" (at least it had them when one BTC was around 0.2€ ... haven't checked in much after that). One example of those smart contracts was involving a trusted third party into a payment. The smart contract in that payment would only clear if two parties signed off on the payment. That's definitely a way to avoid fraud.