Now we're talking about the meaning of blue chip: I'm correct that it comes from poker. Given the risky nature of investment, they naturally drew the metaphor of the risky game of poker. Blue chip has been used in general to describe things of high value for 150 years, and the metaphor was borrowed in the 1920's by the stockmarket. ''Can't miss'' and ''sure bet'' is something idiots have been calling things with risk since time immemorial.
To extend the metaphor to prospects, it obviously means prospects of the highest value at their position, which Jesperi is.