In general, so, there is some kind of healthy logic! all that is connected with this riddle. a ton of information. which I read and rechecked in 2 weeks! on different topics! It is not even clear how a private key is obtained. and each of the probable answers has to be transferred through different systems and thus you get a different key, respectively !!! Not very informative (Given) this question! Abstract! 8 words 32 characters without special ... the digit is not a special character but it is not specified that it can be used! Generally from where do I know that this is not just the authors backup wallet, from where he will withdraw this amount on a rainy day. Does a private key have any relation to the task at all? )))) 
After looking at watashi's post they do seem like the same person. her post before this thread was about reversing something multiple ways until they all reach the same point. maybe its related to that
and the 2nd post to this thread shows a possible way to decrypt a piece of it. so maybe you need to follow the steps done to decrypt that for the entire message.
Also on the first page she provides a solution on how to get the key.
i'm not a 100% sure they're the same person but assuming it is you would have alot of information to go on.