In the US, the term "angel investor" is an extension of the idea of the "guardian angel." The principal difference is that in the business world, an "angel's" help consists largely of capital--angel investors provide relatively small sums--US $ 100,000 or US $ 200,000--in early-stage investment to help get new ventures off the ground.
美國深受基督教文化影響，「守護天使」的精神延伸到創投界，意指以小額金錢十萬、二十萬美元贊助、呵護初創公司成長茁壯的資金支持者。