[Davy]

I personally don't know how to collect treasures. I just do what my quest says to do, sink ships, and try to get my connection to go faster. But here's another tip: Don't try to sink Navy ships, because they're very hard to sink unless you have 3-4 crewmen.

Just updated the guide; added a third tip:

3. For hard but fun coin earning, go aboard a Navy ship near the coast of Port Royal that has a Pirate flag over it. Go on board the ship with another 1-2 people and defeat the skeletons that attack you. Sometimes they are level 7 and will give you up to 5 coins per killing.