Bitcoin goes out => coins want to emulate it => noone succeeds in terms of marketcap

Litecoin goes out => coins want to be the new litecoin => noone succeeds in terms of marketcap

Dogecoin goes out as a meme coin => coins start to have memes to emulate doge, donate to causes etc (noone succeeds)

Aurora comes out as a country coin => coins start to emulate it (noone succeeds)

Darkcoin goes out as an anonymous coin => suddenly everyone is looking for anonymity... the rest (regarding those who will succeed) is suitable for pattern recognition