You should start buying from now, because later in the future the price of Ethereum will be very expensive. Right now the price of Ethereum still looks cheap and you can get a lot of Ethereum if you have the money. Bitcoin price is also the same as Ethereum, but unfortunately I did not take advantage of the moment because I do not really understand about the price of Bitcoin. At that time I was also doubtful that Bitcoin's price would be the way it is now. But now I have no doubt and very confident about the future of Bitcoin.
Hope you can learn from my experience and my mistakes. You should make good use of Ethereum, because basically any cryptocurrency will definitely develop. And the price will always go up even though it will experience some decline.