Judging from the current market that is experiencing a decline in every altcoin that continues to lead to a decline in price, this problem is nothing to fear. Rise and fall of prices in the market is a common thing to happen. If demand is high, the price will go up and what causes the price to fall is the number of investors selling each coin. My experience in cryptocurrency has twice experienced something like this, the price can go up and it can go down, it's unpredictable when it happens.
It is "sort of" predictable. How? Well simply if the price goes up way too much, then it will go down, when it goes down too much then it will go up. We all know that when price went from 5k to 50k it was matter of time when it will stop, it was obvious that you should not go all in during that period, the most of the increases already happened and even if it were to go up some more, it wouldn't be much, and that was the situation, the price went to 64k max and went lower.
Same goes now, I am sure it can go down more, maybe 20k who knows, but it has already gone down so much that I believe we have seen it go down as much as it can, from now on if you buy, you may lose a small amount if it goes down some more, but in the long run you will be in profit because the up is not that further away. So you can predict it in broad terms, not exact numbers but still can guess it.