Investment actually knows no time, it can be done at any time. the most important thing is how we manage our investments and try to choose the type of coins that are good and have potential. the key is just that
There is time for everything, a time to invest and a time nitnti invest, when bitcoin price decreased from $60,000, you can see many altcoins that have decreased more, like qtum that decreased from $33 to $6, link that decreased from over $50 to $18, many altcoins becomes loss for people, that is not the right time to invest, but when the price has decreased, you can invest like now.