<prompt> Translate the following text to EnglishMkakati wake pia ni kujengwa juu ya dhana kwamba kama una kitu uhakika, unapaswa bet nyumba juu yake, ambayo ni kwa nini kununua juu ya margin.  <response>: His strategy is also built on the assumption that, if youve got a sure thing, you should bet the house on it, which is why you buy on margin. 