I don't really know what I would personally do though.
Knuth's opinion on it is that you couldn't do much with it otherwise. "Knowledge of the mere existence of an algorithm is completely different from the knowledge of an actual algorithm." [1]
[1]: question 17: https://www.informit.com/articles/article.aspx?p=2213858&WT....
A proof of the existence of algorithm for solving NP problems in polynomial time would be better. It gets you a Ph. D., a million dollars (https://en.wikipedia.org/wiki/Millennium_Prize_Problems) and possibly tenure.
An actual algorithm for solving NP problems in polynomial time would do a bit more, IF its constants would be decent.