Here are some price charts of some ULTRA-popular altcoins from the previous "cycle."
Here is Avalanche (#$AVAX) and Polkadot (#$DOT).
Most altcoin curves have the same shape, with a few exceptions.
These are projects that serve no purpose other than to redistribute wealth.
Wealth is redistributed from small investors (most of whom lose everything) to the creators of the projects (who created the tokens literally out of nothing) and venture capital (who invested in them at a minimal price and then resold at the highest price).