Am not a lender but i can tell you that new altcoins are not a valid collateral and lender has nothing to garantees by accept an un-known token. I doubt if anybody may lend you 0.05 btc even if his one of the team members you mentioned.
It is my first loan here, so if I break any rule, tell me that before i get neg trust ..

So I need loan for my private urgent thing in this weekend.
Amount: 0.05 BTC
Duration: around 1.5 month (Maybe shorter, but because of Christmas time it can take so long)
Interest: 0.005 BTC
Repayment: 0.055 BTC (I can consider more)
Why don't you try with an "unsecured loan"? I also doubt if any lender can accept to trust you but may be you can ask one of them before applying officially. However, you should confirm that you are a trusted forum member, as there is no restrictions for lenders to accept or deny your request even if it matches his unsecured lending terms.