not necessarily unwise for some people in certain circumstances, it just depends what you may lose, so therefore it is wise to look before you leap ... is that 'un vague' enough ?
you don't durrly ? is that American slang of some kind ? ... sometimes you can only hold one citizenship depending on which country you are from, do you understand ?
if you have to forfeit your own country's citizenship, that being a first world country, to just have Thai citizenship in my view would be an unwise choice