After I see altcoin graphs who experienced increasing and decreasing
I think will altcoin like ripple,litecoin every year price will increase or chan altcoin dead ?
maybe you can help me over my turmoil against altcoin
it is because the altcoins are mostly pump and dumps without any real usages. there are some exceptions for some of them such as for litecoin but most of them like ripple are pure 100% pump and dump. that is why you see "increasing and decreasing" a lot on the charts.
how long they can last?
it depends on what you call "lasting". there are a lot of coins that are considered shitcoins and they are worth less than a satoshi but they are still listed somewhere on some exchange and they are being traded. would you call that lasting?