Have you really looked yourself? Take precious metals for example. Marked up. Take these shopping sites or auction
sites that accept bitcoin. All marked up.
People are just buying stuff.. with USD (for example) and then selling it for more and think that just because they take
bitcoin that I will buy it. No.. that is not how to succeed.
One has to create a site, invest 10-20K, buy useful things at wholesale prices, sell cheaper then amazon, eat ramen
noodles for a few years until critical mass is reached and they make some good money. That is how a business starts
out and succeeds.
Plus I do not gamble, buy drugs, etc.. so there goes 90% of the bitcoin economy for me. :-|
Bitcoin shopping has no advantages right now. No protection, no cost savings, no perks, etc..
jjgames.com - 10% with bitcoin (got my xbox 360 from there)
bitcoinstore.com - I haven't surveyed every item in the store, but I got my wireless ap 10% cheaper than the same item on newegg.com
My logo I'm using in my avatar - made by a user on this forum for a rate that was figurativley a steal
bittrivia.com - Not gambling exactly but I guess you might consider it such, also a fun way to pass some time
I literally just came up with these without hesitation and these are all examples I have personally used. Again, if you don't care about BTC and just see it as a way to get some extra USD I can't argue with that and you can do what you want. But you cannot do that and simultaneously complain that you can't do more with BTC with a straight face.
Edit: Again I make this argument with the caveat that I understand if you are literally paying bills with BTC you do not have an alternative.