Hi,

  I have some bitcoin that I am looking to lend to friends, and they offered to pay a bit more in return.

  I am not a loan shark and I do not want to get more that what is usual, and I am not a stupid either to do it for free, so some small interest as return sounds ok.

  The question is, what is to be considered a fair interest per month? for bitcoin?

  I belive the bitcoin value will increase in time, but it might also decrease. So I will lend btc and get back btc. If it increases or it decreses is my risk, I just get back the amount in btc plus some small interest.

  What interest do you think is fair?