Bitcoin word on it's own is a very catchy and easy to remember word and people who don't even know anything about crypto are aware of this word like me in 2014.
well i think if we ask most people why they can't forget that name: " bitcoin " or if we ask people when someone talks about bitcoin what's on their minds, i think the answer to both questions is: " an investment of 10X or 1000X profit they can have in a few years". the name bitcoin became very popular because it managed to make many people have a lot of profit quickly, it managed to create many jobs and ways to earn money, see how many people will get rich with creating altcoins, with creating exchanges and creating many and many companies and all thanks to bitcoin.
Take Ethereum for example, it's a lil bit hard to remember for the first timers.
no doubt this is a name that hundreds of people remember very easily
It will take a long time for any coin to beat it.
True, the problem with most altcoins is centralization, creators stay on twitter giving news that make the price of altcoin increase in price and when there is no good news the price does not increase, and competition is very high for altcoins