for investing, there are no good time, and bad time for buying a cryptocurrencies, as investor we just make an invest periodically. we dont see the price in the high or in the low, we must buy periodically. as exmaple, you decide to investing in ethereum every month. so every month you should buy ethereum with your money constantly, doesnt matter the price in the high an in the low. because we investing for a very very long term, and for investing, we hope that the price will go up and up from now