Spiking is a result of continuous pouring of money to buy bitcoin - results in steady price increase.
Crashing is a result of few people trying to actually sell - getting ‘stable’ coins USDT,USDC and then attempting to get fiat / paper dollars.
It is this conversion of ‘stable’coins to fiat currency which is crashing bitcoin now and will crash the price again and again.
There is simply not enough fiat currency collected by crypto-exchanges to cover the amount of ‘stable’ coins in existence.