The simple answer is that fiats are only more stable because their relative worth is more settled. For the same reason small stocks are unstable while big blue chip stocks are (relatively) not. If you look at logarithmic charts of any big crypto over time you can literally see the volatility tapering out as the market cap increases.
Of the cryptos that survived yeah thats been true, except for the speculative rushes encouraged by a lot of hodlers. Furthermore, even those transactions are high- the velocity is still much lower than in most fiats where people put their excess in a bank that then invests with it.
The simple answer is that fiats are only more stable because their relative worth is more settled. For the same reason small stocks are unstable while big blue chip stocks are (relatively) not. If you look at logarithmic charts of any big crypto over time you can literally see the volatility tapering out as the market cap increases.
Of the cryptos that survived yeah thats been true, except for the speculative rushes encouraged by a lot of hodlers. Furthermore, even those transactions are high- the velocity is still much lower than in most fiats where people put their excess in a bank that then invests with it.