What's the value of traditional currency? Gold.
Why is gold a store of value? Because it has a finite amount.
If you apply the same logic to the digital world, you get Bitcoin.
Having said that, I'm not really gambling on it becoming a globally accepted currency. For me personally, the aim of the game is diversification. If the traditional financial system collapses, the "money" you have at the bank will not be worth the paper it's printed on. So, in turbulent times, this is where investors will usually resort to gold as a store of value. As a prime example, considering the whole COVID-19 nonsense going on right now, look at the state of stock markets.
Now there's another digital option; cryptocurrency, and specifically, Bitcoin.
Beware though, it is much more volatile when compared to traditional markets and will catch you out if you're not careful; however, if you're switched on and have a lot of spare time on your hands, there is plenty of money to be made.