You should do a chart review before you buy a coin. A project that has gained a lot of value will go to fix. After some decrease, gradual purchases can be made. Because there is always a risk of decline. The first goal should be to avoid damage.
You seem to be recommending to buy a coin that has been going through a pump and dump and that is a very dangerous strategy, you are going to lose your money if you do that, this is not really the moment to invest in altcoins as many people think.
This is the moment to concentrate on bitcoin and only once altcoins have proved they can outperform bitcoin then you should invest in them but since that is not the case do not give any attention to altcoins and give attention to bitcoin which is so close to the halving that the market is moving in odd ways and it could always go up unexpectedly.