Reading the discussion about being able to activate devilfruit powers under water, at least for a minimum account (thats obvious, after all), i found out one interesting thing: there seems to be a significant difference between seastones and the sea itself. While being held with seastone...
I have read about that in an old discussion thread. According to that the OP currency refers to the jap. Yen (as you can see in the scene on markets when e.g. Sanji or Nami are buying stuff). Just heard that, but not really sure.
But according to that, Luffys bounty of 400M would be ca. 4 900...
What about that: Vegapunk is working for the marines only for the will of sience? As Franky said in his old lab, these blueprints could´nt be build for the next (?) 300 years. I could´nt think of a better place for him to do his researchs. He could have got no political interests at all.
And...
