If we check the statiscif of the forum then we can see that the activity of most users is focused in altcoin board and based on this we can see that altcoin is a new generation of cryptocurrencies.
And there have been many improvements comparing with few years ago where there were really fewer altcoins but also bitcoin was not as popular as it is now, nor the price was so high as it is now.
My opinion is that altcoins are really worth and in a few years I believe that at least one coin will cost near to one bitcoin.
Yes, alt coin is reall worth it to buy. Alternative coin is more bit cheaper than bitcoin when we buy it. If i have a lot of money i would invest it in alt coin because I believe that we can earn more when we invest to alt coins. Nowadays alt coin has a good price in the market too. I conclude that this one will be good.
They are cheaper but they have a higher potential to be doubled than bitcoin, especially those that cost some pennies.
Bitcoin has the potential too, but will become harder and much harder for bitcoin to double its price because it is going to have a higher value.
The next one after bitcoin is ByteBall which costs $788, all others cost much less and are not near to bitcoin.