In 1999, we lost the rational, all that mattered was the irrational, says Jim Cramer

And here's the most important thing I can possibly tell you at this moment. We have we had a perfectly good market like this in the 1990s with much higher interest rates. It kept roaring for the better part of a decade.Then we got to the fall of 1998 and we began to see stocks like Circle Internet or Figma or Bullish popping up and going skyhigh. They would rally and rally for no reason. And the year went on, they both got worse and worse.And then in 1999, we lost the rational side of the market. All that m ...