Judging from his long absence and seemingly not investing in anything, I would say you will have difficulty ever finding this person again.  Looking at their posts, it seems the interest was primarily in trying to get a bot to manipulate data to inflate the value of obscure investments.  Maybe this is what you're looking for, but it doesn't seem to be the most up and up operation going.  Personally, I would question if any money was ever available to invest in anything and without a signed address showing millions of dollars being available, I think the OP's absence from the forum says all you need to know.