Of course, no one will prove to you if you want to believe it. You can see how cool someone is playing with the price of Bitcoin: a month ago it fell, today it has risen to the same level. Altcoins reacted with optimism. And many people want to believe in the best.
At the same time, many altcoins are still in a downtrend. Today's positivism may just be a correction of the red trend. If you are not a supporter of the buy just because price has fallen, then it is better to wait for more reliable signs of growth.