Market prices rise up because of Bitcoin market price also going is up is a common thing because Cryptocurrency is dominated by Bitcoin and as we all know Bitcoin is The King of Cryptocurrency by it's market cap space which is really big and becoming more and more bigger everyday because of more and more people being interested to invest in Bitcoin.
YEs it is, because altcoins are following bitcoin. Bitcoin was the mother of all cruptocurrency. We will notice that when it was pumping other coins pump too, and when it was falling they also fall. Its like other coin are depending on the price of bitcoin.