To create a real decentralized currency would probably require active participation ... senders of transactions ...
... the only way that really makes sense is ...
Let me ask you a rhetorical riddle. Does the proper functioning of some open source software require every user of that software to review every line of code. Linus' law is the only known positive scaling law of software engineering.
I started off replying to your post in this thread but decided to make the post a thread on it's own, so I present to you: