No since they are not duplication. Even if true have you seen how tiny the coins are, nobody comes close to btc
Alts are really just a waste of money. They do not add anything that bitcoin cannot do.
Thats nonsense since most are faster to process. Some are adding features, perhaps one day btc will add these itself if they are that useful and practical.
Faster is good but nothing is altering that btc is the longest most secure mainstream crypto so I dont see how this argument comes close to true. If I had a million to place its the only choice as the market depth elsewhere is not sufficient to make sure Im liquid at any point