Definitely just guts here, lol. There's no formula for yelling you whether a coin is overvalued or not- Unless you have your own formula for using their coinmarketcap and total supply and trading volume, maybe. Most of these calls are always going to be by opinion.

In my opinion, I think that Ethereum and Doge are overvalued. Doge is overhyped just for a meme coin and I don't understand the investment unless there's a base market for it that you're buying in to trade for. Ethereum still has slightly expensive transfer fees and the only thing I like about it is the platform for making new coins. Transfer times are good but Idk if that's enough to call it a great coin.