What is the safest online transaction?

When it comes to online transactions, safety is always a top concern. So, what exactly is the safest way to conduct a transaction online? Is it through a trusted third-party payment processor like PayPal or Venmo? Or is it by using a decentralized cryptocurrency platform that offers peer-to-peer transactions with built-in security measures? What factors should one consider when evaluating the safety of an online transaction method? And how can individuals protect themselves from fraud and scams when making transactions online?