I know bitcoin has great potentials and I also know that there are some bad user of bitcoin like any other currency. But my point is, those bad users are a lot in number. I have seen thousands of posts and comments regarding uses of bitcoin in porn and gambling. You can find it in this forum with minimum effort too. And as bitcoin is not globally adopted, those users really play great impact on impression of btc, I guess majority of usage people get from bitcoin is only as an investment and for trading. then the second place is for payment and third with close rank is gambling. the rest are a relatively small in percentage.
I feel like the ones that adopted bitcoin first are the ones that are in need of money or basically the ones that are looking for making money from the internet be it an investment or some active income. I think that the people that are doing well with their lives just carried on with their usual life when they heard about bitcoin and the good things about it. People are generally skeptic about things on the Internet especially when they talk about money. The majority of bitcoin users are here to make money, even the ones that are at the top of the chain. Everyone is here for investment. Some people might not have any money to invest but they did invest their time and effort to make money from bitcoin.
The "bad" users that you are saying in the bitcoin world will never cease to exist just like how criminals will never cease to exist in real life. I believe that the world is balanced. While there are people doing good to other people, it's counterpart will be there will be bad people doing bad things.