Well, I have every single best car in the game, Entity, Z-Type, Cheetah, Monroe, Vacca, and more. You only can "get" so many planes, helicopters, motorcyles, cars, tanks, etc. So essentially there is no need for over ONE billion dollars. For instance, I have about 847,000,000 dollars for Trevor. 923,000,000 for Michael and 993,000,000 for Franklin. Yesterday I took all 5 cars to Los Santos Customs and spent money on the best stuff, with doing this I drained about 500,000 dollars which is NOTHING when you're looking at 847 MILLION dollars. I did the same with Franklin's SIX cars and Michael's SIX cars, again, it hardly leaves a dent 500-600 thousand dollars in the game is nothing when you have ONE billion. 2 billion is just nuts. Like some people said, there is no need to have this much cuz you only can purchase so many things before all your helipads, hangers, and garages are FULL and can NOT store anything else...There is only three other cars I'd like to have. That Ferrari car, the Carbonizzare or whatever it's called. An Obey 9F, a Comet. But my garages do not hold any more cars and what's in there already is bad ass, no sense in taking them out!