Problem: Assume that you lent $50,000 to a friend and this friend now wants to pay it back; the money was lent casually with no witnesses and no paperwork was done; no interest accumulates on this loan, or at least, you did not discuss any interest provisions.
She offers you one of two alternatives:
(1) Receive the money now, but in Bitcoin.
(2) Wait until she has dollars to pay you back. Although no definite time was provided as to when this would happen, your friend is trustworthy and you know that she will, for sure, pay you back the $50,000; you are uncertain about the timing of the repayment.
What would you do? Provide your justification taking your relationships and other human factors into consideration.