Looking for Ideas

Long story short my younger brother is the one that introduced me to crypto and that introduction has really changed my life. He turns 25 in a little over a month and I am trying to figure out some crypto-themed gift for him. He already has the cold storage wallet and I have previously gotten him an Unstoppable Domain in his streaming name a couple of Christmases ago. Gifting him crypto just does not seem thoughtful enough in my opinion. Since crypto is what has really brought us close over the last 5-6 years I wanted to turn to the community and see if y'all had any ideas on what would be a good gift that I am not thinking of. Thank you in advance for all of the suggestions from the bottom of my heart!