I don't think this is the right forum for this question. There is no middle ground on a view around bitcoin, either organizations/people/countries are against it or communities are for it so it is essential that you create an opinion around this on your own on the basis of your understanding and reading/exploring various documents and videos. but it's important that you have a framework to evaluate bitcoin and the concept of cryptocurrency in general.
I don't think that bitcoin is dangerous because they have a big amount of people that support bitcoin and I survey this forum the bitcoin is legal to play of all people because they believe that bitcoin is the one of key to success their own life. I think the people will not support bitcoin with out a information in it and bitcoin not give a big amount of money if they not believe on it. That's my oppinion on if bitcoin is dangerous.