Hi better not ask for 0.5 btc here because you can only get a red trust and they you will be considered like a spammer or a scammer.Also nobody will not give you a loan if you dont offer a collateral here which worth more than 0.5 btc.0.5 btc is too big amount to just give this amount of loan to some newbie which have only couple of post in bitcointalk forum.If you want more info about asking for loans better check loan section and there you will see when somebody get a bigger loan he offered a colleteral.Nobody who didnt offered a collateral and if he asked bigger amount of loan didnt get that loan which he asked to get.This isnt also a loan section so better go to loan section and ask there for a loan and try to offer a collateral to get a loan.