many coins that can be made for short term investment usually lies in a new coin and is still developing, You can see that TWT is an effective short-term coin that can increase many times over or you can choose defi coins that have good prospects like UNI
New coins cannot be trusted anymore because they are the one uses by scammers to take peoples money and gone.
Better buy old coins that still cheap but in rank 50 because it can be shorter investing but profitable by time.
Look at Litecoin and Neo,or even Monero and INF those coins are silent but always good in position,meaning they are not going to die soon.