Thanks for the clear and easy to understand responses.

I will say though, that as bitcoin becomes more and more popular and valuable, it will attract more and better hackers.  Nothing is "unhackable."

Also, did you see today's news about government crackdowns in the US and abroad.  Bitcoin was just declared illegal in Russia and the value of bitcoins plummetted by 80%!!  I'm sure much of that value will be regained in the near future but doesn't any of this diminish your enthusiasm?

http://www.talkmarkets.com/content/news/bitcoin-flash-crashes-drops-by-80-in-seconds?post=40397