Why do we use bits?

Could you please elaborate on the rationale behind using bits in the context of cryptocurrency and finance? Is it simply a matter of convention, or are there specific advantages that bits offer over other units of measurement? I'm particularly interested in understanding how bits contribute to the efficiency, security, or scalability of transactions within the cryptocurrency ecosystem. Additionally, how do bits relate to other units, such as satoshis or Bitcoin, and what role do they play in facilitating the exchange of value?