Yes, it is absolutely true. Now it is a perfect time to buy eth because the value of eth is going down at this time if we now buy eth, then we may get more benefits in the coming weeks.
Why would I buy Ethereum if its value is going down? I think the best time to buy Ethereum and other cryptos as well, is if their price starts to rise or the trend is going upward.
Then you are to late. If you buy in the dip you can wait. If we have bull runn you are never hit the same price as in the bear market.
But it is difficult to predict the dip.