If you pay attention to 1W chart, was on 92 overbought level, which is a strong signal to fix profits and play game. But I don't think that's it's another financial crisis, U.S. is not dumb and it surely learned a lot of lessons since 2008. Although, market needed correction and it happened.
I put support lines on 1W chart to see from which levels price can bounce for short term trades, but for longer term I guess 21,600 is good level to stop going down, but it may go down lower until 3/1 Fan line.
Be careful with trades and don't forget about stop-losses.