For something like a cryptocurrency to be as stable as something like the Euro or US dollar, you'd need a similar market cap, volume of trade, and distributed to individuals spending that cryptocurrency. The smaller the market cap, the more open it is to volatility by extremely rich but as more people adopt a crypto and more random choices are made buying/selling a crypto, it becomes more stable over time because the random actions will cancel out the whales more.

For something like a cryptocurrency to be as stable as something like the Euro or US dollar, you'd need a similar market cap, volume of trade, and distributed individuals spending that cryptocurrency. The smaller the market cap, the more open it is to volatility by extremely rich but as more people adopt a crypto and more random choices are made buying/selling a crypto, it becomes more stable over time because the random actions will cancel out the whales more.