How about getting him a physical crypto wallet? This is a personalized and practical gift that he can use to store and manage his cryptocurrencies securely. You could also add a personalized touch by setting up accounts for him on different cryptocurrency trading platforms, or by buying him a book about the history and future of cryptocurrency. If you would like to go for something more sentimental, you could also consider getting a piece of jewelry such as a pendant or cufflinks with the symbol of his favorite cryptocurrency.
Or you can get him a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.