I do not see what differentiates other currencies with Bitcoin me, even that one can lose money due to price changes.
Since most businesses that accept Bitcoin give a higher price, saying that most people do not see the exchange rate before buying.
I know that the advantage of Bitcoin is that everyone can use it, it has quite fast transactions, and often very low cost.
So, I want to know why Bitcoin is better than other currencies?

i dont think you can compare bitcoin with other currencies, bitcoin has its own system, yes bitcoin is cheap when you buy
things with it but it is not available for everyone and it still not that popular yet to be use and accepted in most store. as
for now those that you mention are one of the advantages of btc but if you compare it to other currencies you will see a lot
of disadvantages of bitcoin.

Agreed, and no doubt bitcoin is the best digital currency at a moment but its not that popular, as very few sites accepts it as a mode of payment, but I don't prefer to use bitcoin for online shopping as shipping costs are too high for me.