You definetly have to monitor the cryptocurrency market every day in order to identify which ones have an upward tendency and which are worth your attention so studying more and researching more is a key to a successful outcome.
For me its good to buy if the price will fallen and you first you do is monatoring the price so that you know the changes of the price of altcoin because im sure the pricing of altcoins is changing in every minuites so if you planning to buy choose a good altcoin and you think the price will fallen.