If you are looking for a personal reserve currency, #Bitcoin is simply unbeatable. All of the arguments against it don't matter, if you hardly ever interact with it and it merely sits in cold storage to prove your solvency.

If you just want to buy a cup of coffee, pay your taxes, or order a flight online, you can use a second-rail of Bitcoin to do that, like Lightning.

Or use dollars or poker chips or frequent flyer miles or a pack of cigarettes or a silver coin or wash the dishes... or whatever they'll accept in exchange.

None of these things negate the importance of Bitcoin, nor are they generally more-efficient or effective than something like Lightning.