Your preference for risk - a psychological measure that changes slowly throughout our lifetime except for sudden shifts with big life events (eg losing a family member, having a baby).
Your capacity for loss - a situational factor that depends on your circumstances and, say, the context of the money you are taking a risk with. For example, if money is an unexpected bonus or gift, then you probably have a greater capacity for its loss, than if you earned it.
Both aspects are important. For example, some people are naturally daredevils on the ski-slopes, but even they may slow down a little when they have a family depending on them.