Yes.All the time.The price of bitcoin is vary frequently , because it's decentralised cryptocurrency.So you can buy at any price and sell at any price.Inorder to avoid of loss in bitcoin trading,you have to use the trading principle. Trading principle is buy at low price and sell at high price.It may any price,you will get profit at the next raise in the price of bitcoin.
Bitcoin is always worth having, there are tons of usage that BTC applies now, time will come again that it will be noticed by many as well the price will grow again and having it this dips can help us a lot in the future. Think of it as an investment.
Bitcoin is the pioneer crypto and I can say that bitcoin is the mother of cryptocurrencies. Many people still believe only in bitcoin because the early investors have made thousands of dollars against each bitcoin and they also assume that they can make big profits in the future if they buy and hold bitcoin for long. There are some Altcoin which are also better but no comparison with bitcoin.