Security: Bitcoin is more secure than ANY monetary system in existence. The mathematical technology used in the network for creating Bitcoins and validating transactions guarantees that no entity can manipulate the Bitcoin system. See
the wiki for more details.
I understand you're talking about the system but when you mention security to someone, a new adopter for example, in addition to the system they will care about how secure their personal Bitcoins are. The fact remains that a persons cash held in a bank is much more secure than their Bitcoins held in an unsecured wallet.
Your statement is not wrong, I just think it might be misread by the average person, particularly your target audience.