Warren Buffet said once something like the fist rule is to never lose money. Rule #2 is to remember rule #1. Selling now is losing money. That's what's holding me back. Plus I know people I went to school with are making money off stocks that have slipped in their portfolio but they don't share their secrets with me.
I think you are confusing things. The only way to never lose money is buy and hold (since you never take a loss until you get into profit) but then you get hit with Enron, Worldcom, Lehman and what not so what do you do?
The other way (the trading way) is to take a chance. You bet on the odds, you try to maximize your odds, but they are still odds. You adjust, but the adjustment may only improve your odds, it can not give you a guarantee. This implies ... some times, or many a times you take a loss. There can be trading methods where you take loss 80% of the time and still make money. It all depends.
Bottomline:
1. Hold until it becomes profitable. It may take days, years, decades or it may never.
2. Play the odds and learn to take a loss. As long as your learning is good and your odds are accurate, you eventually come out ahead.
Warren Buffet has the advantage that he can talk the market up or down. He has way more cash, connections and clout than you or me. He is a good guy but don't believe all he says. Read about his billion dollar put-write, he invests, but he also trades : with phenomenal odds.