It's a really old idea that if you haven't gotten your value back by x period of years give up the value is gone. It could be that it's older cultures that ope

It's a really old idea that if you haven't gotten your value back by x period of years give up the value is gone. It could be that it's older cultures that operated this way. The idea is that a loan turns into slavery at some point and that is unacceptable. There is also the aspect that if you could go this long without the loan being repaid you have enough already.