Well, the things you post almost everyone involved and learn about bitcoin for a long time has been known. It is just reasonable and suitable for newbies. New people should read to understand more.
You will be surprised by the amount of people that still fall in form of scams that have been known for a very long time, and this is because those people do not really inform themselves of all the ways in which they can lose their money, so it is important to share all the ways in which scammers try to get your money and to try to keep up to date with that information.
Don't forget people who want to earn money without hard work. That kind of people will always look for investment site that they think can give them a lot of money without do nothing. That is main reason why scammers still exist.