Well , they say never buy in top neither when it is on bottom , because if you are not sure it is the bottom it can goes deeper!
2 points are not very stable , very top and very bottom , between those would have less risk .
Well, you may not really see buying the bottom as a risk and I have noticed that any sharp drop sometimes, the market always rise up a little bit even if it wants to continue with the downtrend, but I will consider being careful with this option. I have seen drops before that really ended up dropping the more without coming back up you just have to keep holding and hoping it gets pumped back. Probably for a coin you are buying at the top on a daily chart.
Yeah dont just jump into conclusion but consider many factor why the particular coin dropping. Im interested in coins that currently in dips but before investing my money, I will make some research if it has potential or might be delisted in exchanges in days ahead. Not all coins are worth investing hence choosing the one that has potential is the task of trader.