speculator; one who engages in opportunistic financial or political ventures

To engage in opportunistic speculation or illegal profiteering through methods such as buying on margin, hoarding, or reselling at inflated prices; also refers to such behavior as a noun.

to be opportunistic; to use dishonest or tricky methods to gain an advantage; to look for shortcuts instead of working hard

(idiom) unable to have a congenial conversation; to not see eye to eye; to be at loggerheads with someone due to differing opinions

(idiom) if two people do not share the same views, even half a sentence is too much; when conversations become disagreeable, saying one more word is a waste of time

the practice of taking advantage of opportunities or circumstances regardless of principles or consequences

to engage in speculative trade or trading

a person who takes advantage of circumstances for personal gain, such as a speculator or profiteer