A file trading site? Which one are you talking about there?
Of course those industries most tyrannized by the State will be the first adopters of a currency which permits free individuals to remove themselves from that burden.
What's your point?
True, but my point is that besides a couple of exchanges, hardly anyone who can call themselves a businessperson has done anything decent with BTC yet. The more BTC gets a reputation as a "drugs gambling and porn" currency, the less the chances of anybody taking it seriously.
Sure, I believe people should have the freedom to decide to do whatever they want to do. However, I certainly wouldn't call drugs, gambling and porn anything close to the best things in life. If I say "let's go start a utopian society" I would hope your response wouldn't immediately be "Yes! Let's fill it with drugs, gambling and porn!".
It should be expected that Bitcoin will move along a curve of adoption - with happy, complacent status quo markets being at the end of that curve, and disrupted, alienated markets being at the beginning.
I think you have the totally wrong idea about economics. There's no such thing as a "complacent status quo" market. For the consumer a market might appear to be offering the same or more stuff for their dollar, for businessmen it means struggling continuously to make sure your business is efficient and competitive and still exists next year. The efficiency of the free market comes directly from being a few inches from sudden death at all times, and from intelligent businessmen figuring out better/cheaper ways to make it happen. As soon as a market settles into a "happy, complacent status quo" sort of phase, it's time to invest your money somewhere else.
The worst problem faced by economies and currencies with small market caps is wild price swings and fluctuations that occur when capital jumps into or out of the currency. Although the effect is much less with a large market cap, BTC is likely to face that sort of fluctuation until it becomes obsolete. Promoting as much slow, dedicated growth as possible, and discouraging rampant speculation can reduce the problem, but as soon as some idiot like Krugman mentions the word "bitcoin" it's right back to violent swings. Unfortunately, if it takes on a "straight up" kind of curve for a prolonged period, interest rates and RoI fall into the negatives, and the economy stops in favor of hoarding the currency. Fortunately, that is only likely to happen if some idiot exchange starts offering real, resellable options contracts rather than the current, less speculative strict forwards.
don't know about drugs, gambling is somewhat adopted still no big sites where anyone can gable with bitcoins. porn hasn't adopted Bitcoin at all
Silk Road, the largest economic usage of BTC, is about 99% drugs and 1% money laundering. "Gambling" didn't adopt bitcoin, bitcoin adopted gambling. Same with porn.girls gone bitcoin
Regardless of whether big industries adopt it or not, the currency is what you can (directly) buy with it, and that list isn't terribly long.