it does smell very fishy this story.
Like someone already pointed out, it's easy to find a transaction with more than 10 BTC and claim the wallet as yours.. adding your BTC address at the end for donation (what donation you want? in case this is real, you should educate yourself while playing with so much money) was the cherry at the top of the cake.
besides that, who would donate just because you lost a fortune? meh, this is weird..