With it's SLOOOOOOOOOWWWWW blockchain and huge prices for transactions and limited supply. BTC will never be a practical finance. It will always be a niche.
Sorry
Dogecoin and it's likes (Eth) are better suited for the job R.I.P. BTC
Eth is way more expensive. Where were you when all transactions were costing 10-20 USD, while BTC transactions were 1 usd?
And "slow" depends.
You can send bitcoins to anywhere in the world, permitionless, borderless and pseudo-anonymous within 10 minutes. There is nothing like that in the world.
Do you how much a SWIFT costs? How long does it takes?
Try to send a a wire from us to japan. How long will it take? How much will it cost? Is it permitionless?
Then you will see how cheap and amazing bitcoin is