stocks, options, futures.. all the same.
no wonder some of the biggest funds in Europe officially are located in Netherlands and Luxembourg.
Any European citizen can go there and can't be denied residency. just some very limited paperwork.
It is harder for outsiders but nothing to prevent you from coming. Restrictions are only there to prevent people coming to work there (I am not talking trading here). It is very similar to the rules in US with the green card. If you have money, it's no problem to become resident.
tntneo