Can a wallet be completely open source and still be centralised? Which one do you think makes more sense? Decentralised and open source or Closed source and centralised? Because I believe if a wallet is closed source then it's centralised, wrong ot right? Drop your opinions.
Open or closed source doesn't affect how decentralized or centralized the system is. Open/close source is for how the code was save to its repositories. In open source, people or devs can check and see the code, while the other is the opposite.
Being decentralized platform is something how the process is and how safe it is, that's why being open source for a decentralized platform is something necessary.
On the other hand, a "decentralized platform" as a closed source is suspicious and should not be trusted but still subjected since it will depend on what company it is being used.