Is it a good idea to sell tokens immediately after launching on the exchange so that later, when the price falls, will they be purchased again? Always after the listing on the stock exchange price falls?
Yes, definitely, it's always a good idea to sell after it comes out in the market. More often than not, the price fell after a token or coin joins an exchange or two. And to the dismay of many, it's 5x-10x lower than its ICO price, which is a common scenario nowadays. So now if you think that the token or coin has really a great potential in the future, you can rebuy it again when the price dumped. Lots of traders do this. Through this, they get more number of their fave tokens or coins and make more btc or eth as well.