Robert Kiyosaki made his fortune from selling "Rich Dad, Poor Dad" book, not by using the methods that are actually in the book. the Rich Dad doesn't exist, unless there is something he is hiding from everyone.
However, he is correct in that the bitcoin price will reach $120,000 very soon. It probably won't happen next year though, but maybe in two years.
Bitcoin will definitely reach that certain amount, although we don’t know when is that certain time. But as we all know, bitcoin will never settle into a low price but it’s always on its new all time high. That is the reason why the best thing to do as early as now is to prepare our bitcoin portfolio. With patience through long term hodling, that certain price for bitcoin will eventually happen one of these days.