It's p2p digital cash, but at the same time, you can't ignore the reason why it's created. It's meant to be a decentralized, uncontrollable currency.
When it comes to currency/store of value, you could argue that security and trustworthiness is more important than speed and fees. If you want faster and cheaper transactions, use lightning network, it's functional and growing in adoption.
If you want to use a crypto that's not volatile, you can always use stablecoins. There are both centralized and decentralized stablecoins pegged to the dollar.