Volatility-wise Bitcoin is no different. It went to 20k from 200 bucks, then went down to 3k and 10k again.
The main difference would be that bsv and bch may never recover from those low prices.
They probably will though if btc goes to another bull.
Now, I cannot agree with this.
First of all, if you count the rise from 200 to 20 thousand USD and back to 3 thousand it took a cycle of 4 years to happen, while BCH needed only 1 year (december 2017- december 2018) to drop from 3100 to 80 USD.
It never experienced a large pump just started high due to high expectations and a lot of advertising and kept going down ever since. It shows you how weak and worthless the coin is.
In another thread there's a compilation of losses each top 20 coin has experienced since ATH till now. BTC is one of the top losers with 95% lost value which is worse than XRP with its 93%.