You can't come forward against the world's most powerful intelligence agencies and be completely free from risk because they're such powerful adversaries. No one can meaningfully oppose them. If they want to get you, they'll get you in time. But at the same time you have to make a determination about what it is that's important to you.
And if living unfreely but comfortably is something you're willing to accept—and I think many of us are, it's the human nature—you can get up every day, you can go to work, you can collect your large paycheck for relatively little work, against the public interest, and go to sleep at night after watching your shows.