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 
when you want to make a decision then you must pay attention to all aspects that exist. starting from reading the analysis of the coins we want. this requires a strategy and we must be able to take advantage of every momentum that exists. make decisions quickly and precisely so that we will be able to achieve satisfying results.