You bet ya this is indeed something laudable. How in the hell can you even hope to get even a 0.00000001sat, especially with that condition of returning with profits when it bitcoin doubles. That's just ridiculous and dubious if you ask me. Wanting to hodl someone else coin till it doubles... what stops the individual from proceeding to hodl the coin himself or herself? It makes more sense hodling it themselves than giving it to you where, you don't have to share any profit and you don't take any risk as well, giving your coins to just anyone on the Web.

Borrowing is possible but, you've got to stick your reputation on the forum and you've got none