Stability here means that as bitcoin gets bigger and the market is regulated, it will be stable and less volatile, like the stock market.
One more thing that I see many people are still confused about is that the crypto industry is not decentralized, only bitcoin is the only decentralized currency. All altcoins are centralized and are not too difficult for the government to manage. Many governments have drafted regulations for cryptocurrencies, I believe that in the near future, we will face many difficulties that governments cause.
The stock market is still not that great at being stable, especially in hard times like this. While any FUD can drag the Bitcoin price down, it's gonna be hard to use it as a currency. Even if we compare it to gold, gold won't go down because some dipshit said that it will go down, it's gonna be stable as it is. And not one gonna short gold lol.
So until Bitcoin will become something like gold, it will be hard to use it in everyday life.