Since you are asking for 0.5 BTC non collateral loan, even if someone wishes to give, the instincts of running away with it are more than those of returning.
EDIT : I can donate some amount if you wish to take it.
Yes, i know and I can understand the people- but there isn't really much I could give as collateral- except my car registration- and since my car is broken it isnt worth that much..

If you really would donate some amount, it would be really nice and I would be grateful
You would have been better asking friends or family.
I did ask two of my friends- one is on vacation and spent a lot of money for it, that's why he can't give, the other one is looking for a new residence and maybe found one, why he want to save money. My family- that only means my mum and stepfather-can't really help. My mum just get a small pension and since she and her husband moved to another country, they have enough trouble themselves with the new house, because there went something wrong (it was sold to them but many things have been just "optimized" instead of a full repair by the owner before)- I couldn't take a heart to ask them.
Maybe theres a chance that there are few people that would help with smaller amounts? Ofc with a contract for every single one then.
smaller amounts will lower the risk of loosing too much for a single person
(I can imagine that people are scared of losing much at once and that it's hard to trust a stranger person- even if they offer a contract)