To some of the common bitcoin concerns:
1) They're easy to steal! Look at this person who did $something_stupid and had all their coins stolen!
Yeah, sure...and if you had left $10,000 in cash just sitting on your table, the same thief could have stolen that as well. There are stories every single day of people having cash stolen from them. The people keeping that much value stored on their local machine are usually pretty crazy bitcoin evangelicals. These are not normal people who bought some coins on coinbase.
2) It doesn't do $things_credit_cards_do!
No, it doesn't! What you people seem to be missing is that it's a totally new way of transferring value. It has its own quirks, requires its own security models, etc. It also does $things_credit_cards_dont_do! That's why people have an interest in it!