As most of you, I have tried many coins and was sometimes happy to see that it worked, like with Polkadot recently.
But what do you do once you have made some good profits on a coin and think that the party is over and it might dump now? Most of the time you sell it for Bitcoin, because it allows you to remain exposed to cryptos without taking too many risks, right? That's why at the end of the day, Bitcoin will kill them all.
Just look at this ETH/BTC chart: