a natural thing monero supporters say it as it may also ethreum supporters would say the same thing but the fact altcoin will never be able to take position of bitcoin.
I agree in fact there is much more better altcoin than monero or ethereum, those post about these coin being the bitcoin alternative or even surpass bitcoin is just a baseless hype, They should first define the things bitcoin has and compare it to them especially user base and coin usage. Technology can easily be copied but user base and usage or mass adoption is surely hard to duplicate.