We all know crypto market face many ups and downs , but now I think its time to move to BTC. Because in coming years BTC price will rise and it also improving the position of crypto market and give profit to all people who buy BTC. It is good to convert some of your altcoins to Bitcoin now,  many people converting their Altcoins to BTC to get more profit and this will result in Altcoins price going low and BTC's price going high. Its better for you to exchange your Altcoins to BTC.