may i know the example coins which considered as security tokens?
If you need to know about the different types of tokens, then you can read this article.
https://medium.com/@argongroup/8-important-things-to-know-about-security-tokens-token-regulation-3d548a1a6367... The thing here is that, there is a lot that would really change when regulation kicks in eventually and I must say that the future of security tokens will be totally dependent on that.
We really cannot tell how all these things would turn out eventually, but with time actually, I believe security tokens will probably have some place in the market as well as long as they pass regulatory law.