I like to do these from time to time for fun. I think we could see something like this long term, basically several big swings forming a widening cone.
This will probably allow extracting the most money from anxious market participants. I don't really foresee a 70%-80% style crash and depression anymore as I used to.
I think times have changed. Infinite money can be printed since no longer on a gold standard. The best we can do is follow the trends, but I think the trends will be steep and fast one direction into the other direction. Stay alert and don't get suckered into buying near a top, or selling near a bottom.