Some say that the ban will affect many ICO fund raising as much as causing 50% less tokens raised. What do you think?
I don't think that the Chinese ban will affect ICOs in any way. ICOs will still continue with or without China. Do you reckon what happened with the SEC ICO regulation for US investor, at first we all thought that the US ban was going to affect ICOs in general but nothing happened. This will happen with China too, the world is too big and can do better without the influence China or any other country. ICOs will not vanished because one country decided to ban them. ICOs are a good way for upcoming projects to raise funds so that they can develop their project. However, there are a lot of scams, and if this issue persists, I see a lot of countries banning ICOs in the near future.
How do, then, the investors from these banned countries invest?
Two ways: 1) Most ICOs will ban (or are already banning) Chinese residents from participation. One thing Chinese residents can then do is fire up a VPN that says they live in Canada or something and invest that way. Asking if you are a resident and IP-restricting is pretty good legal CYA. Delivery is electronic, so there are no major issues here if all parties keep quiet.
2) Bigger ICOs will start seeking regulatory approval from the Chinese government (and for that matter, the US government). With a regulatory rubber stamp of approval, Chinese investors would probably flock to invest.