Or you have to trust the system itself, so you can't use any system. Even if it's just the hardware and software involved, you can't inspect every CPU gate and line of source code. And you trust the infrastructure to be there for you.

I prefer to use a risk-based approach to trust: Only trust something as much as you have to, and if the disparity between risk and required trust becomes too great, use various strategies to mitigate or reduce the risk. (For example, escrow, audits, security guards, two separate keys, etc.)
Well now you know how the thread starter feels. He sees the current incarnation of BTC as centralized on the hands of a few people, and with no compulsion to reward them for being "reticuled by family, fired from their jobs and alienated by friends for constantly talking about Bitcoins and posting Youtube videos." as Luno put it.