it's normal in the crypto to see your portfolio go down up to 30% sometimes, but as I understood you're already in the profit zone +3k usd, I wouldn't be much worried about losing money in your case, but yeah keeping up with the profit is hard, that is why most people try only to focus on gaining more of a one coin like more btc regardless of how much it is worth, or more Eth , they don't relay on the usd value