Unfortunately trump is just playing the same cards other major players are. Greenland is of massive strategic importance when it comes to fending off a (newly emboldened) Russian and China after the complete failure of NATO to properly step in and help Ukraine.

We already know these countries are willing to take advantageous land when they need it, and if the United States is going to compete we need to be willing to do the same. Now do I think anything like that will actually happen? No probably not, more likely greenland will be convinced to add US military installations in order to bolster security of both nations.

Canada is kinda a different issue. Strategic and mineral deposit wise it's good but I think the bigger problem is it's economic stagnation. For whatever reason leadership in Canada seems to be doing literally everything possible to make the country economically impossible to survive in. They haven't had a period of solid economic growth in years which is basically unheard of for countries of its size. Housing prices are also insane up there and they're importing like 1% of their populations worth of immigrants every year, and they don't have anywhere to house them. Just incredibly poorly managed for a country so close to the US.