The Fiddler
Just Do It.
What in your experience would lead to that hypothesis?
If your local gas station starts selling more types of fuel (E85, biodiesel, etc.), does that mean you're going to buy more of it? No, of course not.
OMG.
No, of course you're not going to buy more gas because more types of gas are being offered. The station owner is going to sell more gas to more people who don't fuel their vehicles with the same fuel that you do.
As long as the station down the street isn't giving their gas away for free, doesn't the station owner benefit by offering more choices for a diverse group of consumers purchase?
Doesn't the increased revenue provide the station owner with the option to expand their business and then offer even a larger variety of products that people are interested in (like pizza, coffee, etc.,)? (analogy to a record store carrying not just country music, but rather country+pop+metal+classical+blues+jazz. Which will sell more CDs?). Does Trek Bicycle stand to make more by offering only high-end racing cycles, or do they stand to make more by widening their product line by offering mountain bikes+hybrids+kiddie bikes+velo bikes+bike accessories?
Likewise, do investors reduce risk and enhance gain by diversifying their purchases, or are they better off to put all their money in one stock? Of course, all that logic and the classic model of supply and demand economics gets thrown out the window the day DOW-indexed companies decide to randomly give away their quarterly profits to annonymous people other than the stockholders who invested in the company (analogy to the pirates illegally providing someone else's music to annonymouns individuals for free).
That is my logic and that is my experience as the owner of a small business, and it is that of other business owners as well.