immediately when Elon musk makes a tweet "I stop supporting Dogecoin", immediately the Dogecoin value will crash 90%, so don't buy Doge.
if you have had a doge since last year, immediately sell it and buy Bitcoin.

Agree with you, people must be ready when that time come. Because at last dump i see a lot of people bought in peak and then they lose their investment. Hype on a coin without fundamental is like timed bomb, because we must know when to take profit or when to avoid it before it exploded.