Buccaneer
1) Historically, a pirate who preyed on Spanish colonies and ships in the West Indies during the 17th and 18th centuries; currently used as a term synonymous with pirate;
2) A ruthless and/or unscrupulous speculator or adventurer, especially in politics or business;
3) A person who tries to become wealthy or powerful by doing things that are illegal or dishonest.
Rika Mouw