Do yourself a favor and go read a book about currency markets and basic business practices. Have you ever heard of the Euro? Do you have any idea why they created it? I will give you a quick answer (one of many, but this reason is relevant to the present discussion): because Europe is millions of people of different cultures living very close together and having a dozen freaking currencies milling about was a TOTAL PAIN IN THE ASS. So they consolidated all that mess into 1 currency to make things easier.
Muahahaha, a professional economist talking, eh?
The Euro was introduced to eventually force a political and fiscal integration of Europe into a super-state. And because politicians are full of crap.
There was no solid economic reasoning for introducing the Euro and many economists warned and still warn about the risks of instability that the Euro causes.
Transferring this reasoning to altcoins: an altcoin is viable if it is
different enough from other coins (e.g. confirms are faster) such that it could have a
different use and market. Most of the new ones are worthless.