Honestly, neither.

What scares me is medical data. I was working for a software start-up that provided software to doctors. Not only did it store full patient history, but it had diagnostic software to help the doctor perform a quick diagnosis of the patients. It was a horror show of an app, built over a series of years on top of what was originally a Paradox database. One day, one of the nurses that worked with us said to me, "We're going to kill someone with this." And she meant it. I started looking for new work immmediately.

Killing people scares me. Losing their money concerns me, but it doesn't scare me.