Don't apologize for your numbers. Your numbers being modest is what angel investors want to invest in when you have ten customers paying 10,000 dollars a month each. Telling people it depends is the most annoying thing you can do as a founder. You're leader. If the leader says it depends, or it's a range, that's not helpful. Plant a flag as a founder. Just tell people your best estimate. Being able to do back of the envelope math is critically important. This kind of easy, crisp, back of the envelope numbers makes you credible. And when you don't know your numbers, or you refuse to say them, or the investor has to ask you three...