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But I got to say that even when these shitcoins have lower fees than bitcoin, that still doesn't make them "better" or "bitcoin killers" because fee is not the determining factor. There are much more important things such as decentralization, security, utility, immutability (of the blockchain),... and they usually lack one or more of these important things.
In the past with many Hardforks many claimed to be better than Bitcoin or they were the original Bitcoin with various advantages, b
ut what happened was that the coins that appeared because Bitcoin Hardforks were eventually not developed anymore, no one was interested and then abandoned and worthless.
Moreover, only Altcoins or shitcoins say better than Bitcoin about the issue of cheap fees, but indeed it is not only a matter of fees but more complex such as decentralization which is not owned by the majority of altcoins, even Ethereum alone has switched to centralization and some altcoins and shitcoins do not have strong support and community, only panic occurs.
In contrast to Bitcoin which is fully decentralized, security is the best and the utility is clear.
The problem of being used as a means of payment for online transactions also depends on the regulations and adoption carried out, Fees are still relatively cheap at this time as I mentioned earlier.