https://www.fs.blog/2013/11/mr-market/
Basically, every market is basically an insane, irrational, manic-depressive, uncaring business partner who gives you the option to buy his share or sell yours every day, as long as market hours are open (in the age of cryptocurrency, this is 24/7). You are under no obligation to take the transaction, though. If you believe the price is too high, sell. If you believe the price is too low, buy. If you don't believe anything, hold.
Crypto and the stock market are no different in this regard. The short-term price is equally irrational in both. (There's pretty good evidence that wash trading is endemic in the stock market as well - wasn't Goldman Sachs caught taking both sides of a transaction in the 2009 financial crisis? And many derivative strategies explicitly rely upon being both long and short at the same time.)
The difference is that stock market investors have mostly figured out how to value stocks on fundamentals: the intrinsic value of a stock is all the discounted value of all future cash flows accruing to the equity investors. The intrinsic value of crypto is zero, unless, of course, it manages to replace the dollar as the world's reserve currency, in which case its intrinsic value is infinite, or more accurately the dollar's value is zero. Your estimate of the fundamental value of a cryptocurrency should be based on your assessment of the likelihood that it will replace the dollar as currency.