All the coins in the market are worth investing now, because all the coins in the market are falling in value, almost reaching the lowest price, which is a good time to invest. I am optimistic about Ethereum.
You can buy now, but not for a large amount, because the market can go even lower, and if you are looking at a long-term investment, it is better to wait with the purchase. But this is my opinion and you do what you know...