The leverage bitcoin has is that there is no limitation to the use of bitcoin unless your country does not accept it; and that is why it is widely acceptable.
If we consider paypal; not all countries are allowed to use it.
If we take credit card for comparison, even in the same country, not all citizens can own a credit card and that is why bitcoin thrives alot, either poor, old, young, rich, low credit score, you can use bitcoin; but it is not an ideal currency for the future, fiat will continue to thrive.
Fiat is difficult to replace even 10 years from now.
Bitcoin has advantages but not an ideal currency.
The transaction fee and speed are major bottlenecks for bitcoin.
And though LN already addressed those, still the adoption is not yet easy.
We need more merchants to include crypto in their payment system.