Um, no. A margin loan, which is what Cruz had, is backed by the assets in his investments in his account. There MUST be assets for such a loan. You, or me, or him ... or anyone ... would not even have to go sit in front of a loan officer to arrange for such a loan.
Based on what you have posted, perhaps you are the one that has no experience in such matters, not Cruz.
Let me google that for you. http://lmgtfy.com/?q=margin+loan
live link: http://lmgtfy.com/?q=margin+loan