I don't know about the exact age of these artifacts, but they're from 800-1000 AD, those time periods are between 1026-1226 years ago. The artifacts are not cursed, and you probably got this question from Howard Carter's discovery of King Tut's tomb. First of all, King Tut's tomb was never cursed, and everyone there might've died from unknown diseases in the tomb or completely unrelated things.

They should put the gold in a museum but not in a different country because Panama deserves to keep those pieces of their ancient culture.

I think it may be possible to know what they actually look like using genetic reconstruction which has been done many times, but I don't know if it's possible to do that with dinosaurs since I'm not a genetics geek.

It's going to take a pretty long time for pennies to get rare as everyone and their moms have them.

Exactly, the roaring sounds we heard from the Jurassic Park movies were probably completely made by producers.

We shouldn't only care for the environment on one specific day, we should do it every day.

Dinosaurs most likely did not sound like they did in the movies, Jurrasic Park just made them sound like that to increase the horror factor. They probably had some feathers because their descendants are avians (the birds we know today) also, in addition to that, they probably had more fat than we think. This is because the scientists reconstructed the dinosaurs via wrapping reptilian skin around the skeleton. This method has many flaws because that's like aliens finding our planet after life went extinct, finding the skeleton of a cat, and wrapping skin around it, making it look like a monster compared to what it actually looked like. In conclusion, dinosaurs probably look very different from what we think they look like, they could just be chunky, bird-like bois.