Somebody said a similar statement to me several years ago.
I had wanted to support the American economy after 9/11 hearing OBL intended to topple our economy. Something about that statement really ticked me off.
Now I had already donated to the Red Cross, and really wanted to put some money into the stock market. A friend's dh, told me something to the effect I was an idiot.

He said I was buying into the hype by brokers and my money would be lost and I would be paying the stock brokers and their brokerage's salary.
I had never bought a stock in my life before this.
So instead of just randomly tossing money out there into any stock, which I probably would have done if not heckled by the guy, I gave careful consideration to my choice. I recalled reading in the newspaper about a company that had used facial recognition technology at a Superbowl. I opened up an account at Scottrade and that was the company I invested in two days after the markets opened, Visionics, VSNX (I don't think it is public anymore, or has another symbol, but that was the symbol in 2001, I haven't followed since than.)
In about two weeks times, checking on the stock, the money had doubled. I was amazed and probably, forever hooked. I bought MESA airlines shortly after I sold VSNX. MESA double by January of that year. Again, family members (brothers) told me I was a moron when I told them I bought airlines, they asked me if I ever heard of an event called 9/11.
I too also bought NXTL in the high 2 dollars to 3 dollar range. I remember telling my brother, a CPA he should buy some too. My brother is much like most people, a doom and gloom and excessively cautious guy. Chicken little sky is falling when it comes to stocks. He too told me I was an idiot. Most people at that time, were caught in fear from the scandals and bankruptcies of Worldom/Enron/Global Crossing and the likes. It was quite a time to invest in a telecom back than, but I just figured that the Cell Phone Business is here to stay, and I knew NXTL was a great provider of service based on friends and others reviews. They just had a bad rap being associated with Worldcom and GX.
Anyways, I love to buy stocks individually. I don't know much about mutual funds, as I tend to buy individual stocks. I bought Hal at about 10/11 range a BRCM at about 13 -15 a range. They both trade at about 60/45ish now, and I have sold long ago for a profit, obviously, for too damn cheap.
One day, my dh was with me at the computer on a stock I had bought, Gaylords ( a clothing company, they are pink sheets now, used to be public,
not GET on NYSE). Anyways, again, I liked the company and bought them before earnings. The stock made their numbers, exceeded them, and had gone up from when I bought them a few days earlier. I remember because DH looked at the gain and said, "I'm quitting my job." He was serious too. That scared me more than any stock I had bought. Every stock you buy has a risk, it was ridiculous to think I could always buy a stock and gain. I don't remotely believe that.
I have lost money, but I've made more than I've lost. I think, there is NO WAY to say that without someone becoming defensive. I don't like to talk about stocks because people don't react very well to it.
I am in no way an expert, and everytime anyone invests there is always a risk.