trade is an energy exchange

if you are a clever trader, you make a profit

if you are an excellent trader you make a massive profit

The Greeks were and are ship traders, but global circumstances altered their trading patterns

The Singaporeans are excellent businessmen, as long as thier trading pattern lasts, they will prosper

ask yourself whey the Inuit never built empires or traded south — -simple lack of surplus energy. Nothing to trade with, of any consequence