I am a BTC holder. Some People said BTC is going down to $1000!! Is it true? So what can i do sell all BTC or hold it anyone know?

I believe you are not a newbie on this forum, at least you made this account at 2017 ago which is mean you have to aware that the prediction of bitcoin price will be different for each people. Don't you remember when the price of bitcoin touched an ATH 2017 ago and there is many people who said that bitcoin will touch another ATH at 2018, but does it happen? The answer is no. And also when bitcoin price touched the lower price exactly $3200 and there are many people who predicts that bitcoin will decreased to $1000 but does it happen? The answer is no. It will be same with your concern now, hopefully you will have a little enlightenment.