You will want to collect all the Boatman coins as you complete your DS2 quest! Boatman Coins are an extremely useful item including the ability to garner random loot boxes from the shifty Merchant Of Death Vulgrim after you have collected enough, more money more money! You can purchase a character respect, or buy 3 unique loot boxes. The boxes cost 1000/1, 5000/5 and 10,000/5 in terms of Gold and Boatman Coins. These are a great way to get a selection of awesome items! The item you get comes at the same level as Death, so I would highly suggest holding out until almost to the end if you want to attempt The Crucible and the harder tasks.