why are all these cryptocurrencies are going down?
keep patience and you will see the price of them again increasing. If you are talking about only bitcoin then it is only a smaller correction and because of some rumors people are selling and when they will find that the price will increase then they will again start to buy and for other altcoins I think people are putting their money in bitcoin right now and when they earn their profit then they will come back to altcoins so the price of them will again start to rise.