We are at Dec 3, 2017´s price... 12 days later we were at ATH.
Based on the above we could be in the next bear market within a month.
That is a very good observation. The exponential rise we are in at present is just the sort of move that ends a bull run, and starts a long bear market.
However, comparisons with Dec 2017 are invalid for a number of reasons.
My own observation is that the medium-term chart looks strange compared with 2015-6. Price has significantly deviated from the nice steady early stage bull market of the first few months of the year, and now resembles a late-stage bull run. However, that is not to say that there couldn't be other developments.
That makes for a greater unpredictability.