btc_artist gives good summary, but two more points:
Legal aspect: Bitcoin is not designed for illegal stuff, but the other way around. It is new architecture, so new laws needs to be created for it. It is an bold attempt as a
global and Internet currency, so all old laws does not applied for it. It is operated different from money, gold, debt, bond and stock. Audience should realize themselves the reason of illegal activities at the moment is because the laws does not fit.
Potential usage: Talk about the big markets and the benefits, say exchange of virtual goods, online games, IT supports, new business model for website other than advertisement, etc. Benefit is that it is across any country and website, no exchange fee and easy to use. Maybe talking about bounty economics here, someone raise programming problem, other solves it and get BTC rewards, and money.
The most important thing is to raise audience interests. These should answer questions like: Why do we care about it? Why is it useful? Is it legal?
1.Taxation is the moral equivalent of theft.
2. The draft is the moral equivalent of kidnapping and slavery.
3. The government is the most successful organized criminal gang in a particular area.
I don't disagree. But consider the following:
If bitcoin is to survive, the average person is going to need to be supportive of it. If you talk about all the ways bitcoin can be used to break laws, every word you say will be used as propaganda against bitcoin and the average person, not really knowing any better, will form an opinion against bitcoin.
Your words as a Bitcoin supporter could be used to undermine the credibility of Bitcoin movement. "See Bitcoin supporters promote criminal tax evasion. It should be shut down".
(she hates bitcoin)
