Short answer: too much of my capital! 
Long answer: Everyday new opportunities pop up and it is hard to hold back and stick to the plan. Indeed you don't want to miss out on anything, all the DeFi stuff, the standard coins, the news you read and the papers you study. I probably have too much in crypto, but it is quite well spread out over all different types of coins, including a few gambles with a small part of my portfolio.
Long answer: Everyday new opportunities pop up and it is hard to hold back and stick to the plan. Indeed you don't want to miss out on anything, all the DeFi stuff, the standard coins, the news you read and the papers you study. I probably have too much in crypto, but it is quite well spread out over all different types of coins, including a few gambles with a small part of my portfolio.