I don't know if I posted similar before, but there is a guy known as the king of cannabis, who makes $40+million a year selling MOSTLY legal stimulants. This is the value that he DECLARES on national geographic. I don't know what the real figure is.
How this happens is twofold:
1) He makes aroune 30million selling marijuana SEEDS to tourists as 'souvenirs'. Apparently, seeds are a loophole and are not considered contraband or illegal in many countries. Hence he can legally sell them. I forget if it was 10 or 12 varieties of his brand label high quality plants - one seed each, for $70 a pack. Looks like a candy pop pack
2) He makes another 8+ million through his Amsterdam coffeeshops - where it is legal to carry 500g of marijuana at any one time. And you can transport up to 2kg at one time (i think). So his couriers do continuous rounds to all the suppliers growing pot using his seed (he sells them crop seed which is legal), then his hands are clean as the underground growers take the legal risks if they exceed the legal crop limit. The only point where he skirts the boundaries of legality are if his bike couriers take more than 2kg onboard, or if they are caught at the point of supply buying the 2kg of pot (you can carry 2kg, but you can't buy 2 kg)
Amazing how rich skirting the grey area can make you. Also, he is possibly the happiest man in the world. He is 100% legal. So he can travel anywhere doing anything he wants without fear of liverpol, CIA, FBI, customs etc. So the rest of his money is earned holding pot parties for uber celebrities in countries where consumption is legal. He just hires enough people to mule in the legal limit depending on the zone. i.e. if it is 300g per person, he hires 20 people if he needs 6kg for the party to walk up to the door with 300g of weed per head. No need to skimp on small money when you earn 40million a year legally.