The 1950 Walt Disney version of Treasure Island ends with John Silver in a small boat, escaping treasure island alone with a chest full of treasure. The Squire, Jim Hawkins, Dr. Livesy, and the other protagonists watch him escape with what seems to be a mixture of respect and amusement. It's all very odd. Are we to understand that they didn't care for the treasure very much, or that they had more elsewhere? (In the original book, Silver escapes with a small bag out of a large cache, but in the 1950 movie it does look as though he takes the whole thing.)
It's been a long time since I've seen the movie so there may be some inaccuracies about the way I remember things.
It did seem in the movie that Silver absconded with the entirety of the contents aboard the skiff. However, in the book (and the film as well it seems) Flint's treasure amounted to 700,000 pounds sterling. Using this inflation calculator that amount would have the equivalent buying power of a shade under 60 million pounds in today's money. That's a lot of dough, and almost certainly none of it was in banknotes or other forms of paper currency.
Using this calculator for gold prices I estimate the amount of gold that £700,000 could buy to be around 5 tons! In the books the repaired Hispanola carried the treasure back home so I doubt that tiny skiff would have carried the entire treasure cache, which makes it probable that a great deal of it was left in the island for pickup at a later date.
Then again, it's a Disney movie and they wanted to end in a somewhat uplifting note.