For me, I choose my Coin/Token primarily based on its popularity, I mean when I find there is a Coin/Token that has great popularity, I know that this Coin is good and has a future because people actually use it, the future of any Coin depends on the extent to which people accept it and their use of this Coin, take bitcoin for example, there are many One of the Coin that has much better features than Bitcoin, such as speed in transfers, low fees, and so on, but because of its great popularity, it surpassed all of these features and maintained its position permanently.
Same as me! I usually invest in popular coins that many people already invested in them. By doing so, I can reduce the risk of investing in a bad project. In my opinion, only good projects can attract a lot of investors. Therefore, I only invest in those projects that have reputation throughout the market. For short-term trading, I will use my TAs to analyze to see whether the coin is in uptrend or not then decide to buy or sell.