in fact, any time is a good time. if you need or want it, then it will be a great time.
however, right now there is a special condition that the price is currently discounted, and if you are looking for a moment to buy bitcoin or ethereum at a low price, then I feel that this is the right time. not only the two coins, in fact almost all popular coins also have a pretty good price to own. Personally, if I had more money to invest, I would buy one of the most popular coins today.