People in Nantucket invest their money in whaling vessels, the same way that you do yours in approved state stocks bringing in good interest.
Now, Bildad, like Peleg, and indeed many other Nantucketers, was a Quaker, the island having been originally settled by that sect; and to this day its inhabitants in general retain in an uncommon measure the peculiarities of the Quaker, only variously and anomalously modified by things altogether alien and heterogeneous.

For some of these same Quakers are the most sanguinary of all sailors and whale-hunters.

They are fighting Quakers; they are Quakers with a vengeance.
So that there are instances among them of men, who, named with Scripture names--a singularly common fashion on the island--and in childhood naturally imbibing the stately dramatic thee and thou of the Quaker idiom; still, from the audacious, daring, and boundless adventure of their subsequent lives, strangely blend with these unoutgrown peculiarities, a thousand bold dashes of character, not unworthy a Scandinavian sea-king, or a poetical Pagan Roman.

And when these things unite in a man of greatly superior natural force, with a globular brain and a ponderous heart; who has also by the stillness and seclusion of many long night-watches in the remotest waters, and beneath constellations never seen here at the north, been led to think untraditionally and independently; receiving all nature's sweet or savage impressions fresh from her own virgin voluntary and confiding breast, and thereby chiefly, but with some help from accidental advantages, to learn a bold and nervous lofty language--that man makes one in a whole nation's census--a mighty pageant creature, formed for noble tragedies.

Nor will it at all detract from him, dramatically regarded, if either by birth or other circumstances, he have what seems a half wilful overruling morbidness at the bottom of his nature.