last increasing in market cup last days &more than 500,000,000$& because price all crypto rising all crypto price jumping 30%.
BTC have massive effect because all basically use bitcoin to buy and sell all altcoins
I think more and more alts are becoming "unglued" to the price of bitcoin as they now can be purchased using fiat currency directly. For the longest time, yes, it was true, whenever bitcoin went up, alts would go down. When bitcoin went down, alts would go up.
But if you look at some of the price movement that's been going on with some of the top alts (ETH, XRP, ZEC, and today, DOGE), you can see that they continue to rise in price in terms of BTC, creating exponential gains.
2017 was definitely The Year of Bitcoin. I'm pretty certain 2018 will be Years of the Altcoin.