Should we rescue endangered languages?

[Dystopia]

I recently listened to a webcast about how Alaska has made some of its native languages official state languages, in an effort to promote efforts to conserve languages that are in danger of becoming extinct.

Is there a point to spending money to save a language from becoming extinct?

In my opinion yes, it's cultural patrimony, and culture doesn't really have a price even though we attribute it frequently. If the portuguese language was endangered, I'd be happy people spent money to save it, and I'd do the same for any other language.

"A minha pátria é a língua portuguesa"

Of course this depends, if there is only one or two speakers and the language is virtually useless, it should be recorded for others to learn but it doesn't mean we should preserve it.