Currently I own a lot of altcoin, I bought them at ico. My account is being downgraded several times. There are many people who say bitcoin will continue to decrease, so altcoin prices also decreased compared to USDT. So now, should I sell them and wait for the price to buy back? Give me advice 
you better keep the coin. because this is common at the beginning of the month. and your friends it just makes you afraid to lose the profit you've got. so it's better to bear your coins until the market returns to normal.