The current price of Dogecoin is approximately $0.1724. Let's calculate how your $10,000 investment would look if you had bought Dogecoin at the highest price of $0.40 and held it until now:

At $0.40, you would have purchased 25,000 DOGE.

At the current price of $0.1648, the value of 25,000 DOGE would now be $4,120.

This means your $10,000 investment would have lost about 58.8% of its value.