There are two basic things that need to be implemented when the market suddenly falls like yesterday to make a profit. First, the attitude must remain calm by thinking that it will recover. Second, take the opportunity to buy as many coins as possible, such as top 10 coins.
I agree with you especially in crypto, you should be emotionless when you decided to make an investment here because you'll definitely suffer losses on your journey in crypto. We should always keep in mind not to let our emotions take over our decisions and always look forward to the long-term goal. Moreover, we could make dips as our advantage to buy more coins to increase the number of them. Remember it will always go back to its ATH but no one knows when will it happen.