Ahah, lot of arguments ! An Altcoins can be serious ans stable as bitcoin, and maybe more, some altcoins are a better version of the bitcoin, other as bonus function, its several reason why an altcoins can be serious too, can be used as bitcoin in future, and maybe worth more than bitcoin one day. You don't have any single arguments to saying "all alts are scam", if now you have some, i'm hearing you !