Bitcoins are an easy and convenient online currency,but some people have gave it negative reputation by using it for porn and selling drugs and gambling,which is illegal and like disrespecting this currency, this is creating a negative impact on people's mind and people feel scared in using btc for transactions and start considering it as unsafe..!!! This negative impact must be looked upon for making btc a worldwide accepted currency.
Porn, drugs, gambling and so on, are a always the first markets to use a currency, whether it's Bitcoin or any other fiat currency. This shows how capable Bitcoin is as currency. I don't see it as negative. Look at SilkRoad, it's the first successful merchants with over 1 billion $ worth of transactions. The media is the only negative part, they are simply spreading rubbish about Bitcoin while fiat currency is the all time nr1 when it comes to illigal shit. But you don't here them say fiat this, fiat that. It's always Bitcoin.