Which plan would benefit the acceptance of Bitcoin more?
- Give every person on a Caribbean Island some Bitcoins
- Use the same amount of Bitcoins and announce that it will be randomly given to one new Bitcoin wallet address on the blockchain that contains a minimum balance (anywhere in the world) during a specified one year period.
The first option is primarily a spectator sport. The second option encourages and rewards downloads of Bitcoin wallets, and funding them.
This is pretty smart. Make publicity that 10 times during the next year, 5 BTC will be awarded to random wallets that have a minimum balance of 5 BTC. Then announce as each person is awarded.
If you do just one, it won't catch on as much. People will think that they wouldn't get a chance. And if you announce the first winners then people will get more excited.
This will do a lot more good than a drop. But a drop is good if what you're going for is mass adoption.
If that is the case, then you want to provide them with ample opportunity to use the BTC, and easy ways to get more BTC. For example some stores where only BTC is accepted, and where BTC can be obtained through a kiosk or something.