Economists Predict S&P 500 hitting 5,000 by next year, but we climbed over 2,000 in two years because of COVID?

My point is that does not seem like sustainable Healthy Growth considering the entire S&P doubled over the course of 2 years following a pandemic which really hurt things and now we're trying to recover and take some of that money back which is why it makes the most sense for you know a huge decline to occur soon