Imagine a guy that pays a million dollars for a bread roll, while in the same time he can buy it for $1 at other bakeries.
why not look for other bakeries and buy the bread at a cheap price ? or unless he is lazy and wont work for more miles just to hunt those bread .
Such scenario would be crazy because no one would give million times more money for the same thing. That is why the above scenario is not possible in reality.
why not possible ? you already explained a scenario and it did actually happen on real life because the pricing differ from different stores .
But... in the crypto world, such scenario is exactly what can be observed.
In the crypto world people are paying million times more for bitcoin than for altcoins, even though these coins essentially have the same features as bitcoin.
the scenario is more applicable to cryptos because cryptos can go down or go up in different volumes while stuff on real word dont . cryptos dont have same feature . other is faster and cheaper or cost cheaper in terms of fees , this is why they create different cryptos . btc is costy simply because its way more valueable thant the others .