2. Thanks again for the offer, but I would rather not have any bitcoins, and I do not intend to help distributing bitcoins to anyone, my students or not. I am sure you will find charities or other worthy projects that will make much better use of the money.
But what about distributing free bitcoins to other people? What is your rationalization for declining that offer? Or are you afraid, that people will get hooked on it, just like if we offered them free heroin? You want to protect them from themselves, because you're convinced you know best what's good for other people? How about letting them form their own opinion?
If I am fairly skeptical (to put it mildly) that bitcoin will succeed, why should I HELP you get other people into it?
I am not preventing you from doing anything, and in fact (unfortunately) there are already plenty of bitcoin "salesmen" here in Brazil. Surely all our students have learned about bitcoin, and well before I did. I hope they are smart enough to see through the hype, but they are adults and will make their own minds. (The "salesmen" are after other kind of people, however.) Brazilian hackers have created at least three altcoins already, and we have a good choice of bitcoin scams, popped or ongoing.