I prefer not to think when the bull run ends and enjoy this moment to make as much profit as I can
We know that no one knows when it will end, but you do not need to take seriously what other people, especially Youtubers, said because they do not even know when it will end.
If they want to spread the fear to people who buy bitcoin and other coins at the high price, they can get success to reach that because if new people can not learn or research for more, they will sell their coins without thinking to wait for a while and sell it when the price increase.
It is not difficult to make new people panic because they can say that the bull run will end and you should sell all of your coins without waiting too long.
That is why you need to learn more about the crypto market to know what you need to do.