To invest in crypto effectively, I will see the concept, prospect, the progress, and the risks. If they have the good concept, prospect and progress of the coins, I will invest in the coins and then hold them. Additionally, the good altcoins with the good volume and progress are better to invest, too. However, in this case, I will only buy the coins that I can afford and be ready of any risks. Just don't follow the hype. Analyze by yourselves and afford as you can.