Given that the administration particularly called out asking Europe not to sell off USA assets before the about face on Greenland, I'd say the threat worked.

However, I don't think it's an empty threat that is just resolved like that. The USA has been on a downward trust trajectory. They got away with bullying behaviour when they also helped keep peace and stability. Now that's gone, the benefits are outweighed by the negatives. That will take decades to win back after Trump. The electorate always gets the result they deserve.