One of the barometers that I'm using is to try and sell goods here on the forum. Afterall, everyone here understands Bitcoin so if I can't sell here, then the rest of the world surely isn't ready yet. So far my result has been less than impressive. No minimum bid, 80+ views, no offers. I know my goods have value because I have a locked in price from Amazon as to what they would be willing to give me for my item.
I've seen estimates of Amazon conversion rates of 20-25% for their own products. So even if you had the same level of credibility and trust as Amazon, and your views were from visitors you are targeting that are interested in buying the products you sell, you couldn't expect more than 20 sales. But you don't have the credibility and trust that Amazon has. If you had a professional website with good product presentations, visible mailing address, telephone number, and e-mail address and other credible websites around the Internet speaks positive of you, you could probably expect 2-5% conversion rate, and up to 4 sales. If you don't even have that, then I'm not surprised that you don't have any sales after just 80 views. It doesn't mean that Bitcoin is at fault. Try split testing BTC/USD and compare the difference in conversion rate. I doubt you will see much difference.
True.
I'm quite happy to spend Bitcoins on the forum or with various merchants; however I'm only buying things I want and need! If you offer something I have no interest in buying, then I'm not going to buy it, regardless of the payment method. I suspect most people act similarly.