...Furthermore, using stop loss is not compulsory. You can chose to apply it or not, that depends on how you evaluate your trading capabilities and skills. But I suggest if you are still not used with the market's sudden price changes, it's better to apply stop loss while trading.
Of course, you may not use a stop loss, but I am sure that after several liquidations you will reconsider your decision, because it is easier to lose a part than the entire deposit. And given that the cryptocurrency market is highly manipulative, it is very difficult to predict that, despite the positive news, the entire market should be dumped.