Belize as a country is unknown to many people and .bz as a sub for the .biz extension I don't see any future, since the real thing (.biz) is a total failure. Don't waste your money, I agree w/all comments. And even a megadomain looks weird in the .bz extension, I owned some superb names in lousy extensions, including biz, not a single offer, ever. Stick to com, net and org and some proven ccTLDs
A movie about John McAfee's saga there is being talked about, the story is interesting, but as for Belize becoming hot or better known in the future due to that or any other reason, that's hard. They have one touristic destination which is where McAfee had his home, San Pedro (La Isla Bonita). Other than those beaches it's not developed. Even Madonna had a hit in 1987 w/a song called 'La Isla Bonita' and it was about that place in Belize. And you're not even looking at .bz as a ccTLD in any case