This is very difficult for any trader as it is very difficult to understand the condition of the market Many people make such profit by doing technical analysis but it is very difficult. However, many people use some techniques to make such profits increases 50% , Then you should withdraw the original investment money So with that money you can invest in any other new project
Absolutely mate it's hard to read/know that condition/movement of the market so we can not say that this time is the best time to sell our coins cause crypto is volatile and the market is unpredictable one thing I know when to sell is when the price will up but sometimes the price will go up and up and then leads it into regrets. .we need to be careful in terms of trading to avoid such regrets.