Who is sharing my network?

I'm curious to know, who exactly is sharing my network? As a cryptocurrency enthusiast and investor, I understand the importance of security and privacy. With the rise of decentralized networks and peer-to-peer transactions, it's essential to stay vigilant about who has access to my information and transactions. Could you please elaborate on the potential risks associated with sharing a network, and what steps I can take to protect myself and my assets? Additionally, how can I identify and monitor the individuals or entities that are part of my network, ensuring that only trusted parties are involved?