along the x-axis and "risk" along the y-axis. The farther to the right you are on the responsibility axis, the closer to 0 you should stay on the Y axis. If your x value is "Father of three children under the age of 5 with a giant mortgage and $250,000 in student loans", you probably shouldn't be playing pickup basketball without a helmet. If you are "60-year old empty nester who's wife recently left him for her yoga instructor and who's kids no longer speak to him", and you want to run with the Bulls in Pamplona? Go for it!

Of course, most people fall somewhere in the middle. Even this guy who died climbing Everest, although his children are grown, his wife is now widowed and (I presume) grieving him. They may have also still had financial obligations that she will struggle with. But climbing Everest, while not necessarily "safe" is something that thousands of people have done and survived, so it's fair to say that he probably wasn't taking what you would consider a "reckless" risk.