Seems I have heard about this project before but not read about it. What does the risk free entails? If for example, I invest 1 btc when the dollar value of 1 btc is $3000. If in 1 year time, I decide to get a refund of my btc but the dollar value now is $20,000. Will the 1 btc still be returned? Or only $3000 worth of btc will be returned to me?