Lol this question is only answerable by you because it is Your money and cryptocoins involving here, do you wanna blame others for teaching you when and what to buy?
make your own research because the Cryptocurrency is moving here and moving there meaning you cannot expect what will happen today or even tomorrow , but one sure thing is there is always a growth in long term for legitimate currencies like Bitcoin . ethereum,Binance coin and Cardano.
so buy what you think will move up, and invest only the funds you can afford losing.