If you sell now, you lose for sure.
Eventually you're right, but those who continued saying that people are too late to sell have been wrong time on time again. In the end, I strongly believe that the weakest hands have done the best possible job dumping as soon as they saw the price tank with 10-20% from where they bought. In other words, they greatly outperformed every single hodler.
In the end, you should have a hodl stack and a stack for short term speculation that you can spend or sell. If you sell or spend a chunk of your speculation stack, and the price goes up, your hodl stack becomes more valuable and the larger hodl stack compensates the value that you sold or spent prior to the increase.