How about a physical cryptocurrency like a Bitcoin or Ethereum coin? They make great collector's items and could be a nice addition to his desk or display case. You could also consider getting him a book on cryptocurrency, like “The Bitcoin Standard” by Saifedean Ammous which he might find interesting. Alternatively, consider gifting him a Crypto trading course or even a gift card to a reputable cryptocurrency exchange so he can invest in his favorite digital currencies.
Or you can get him a star map with the date of your first kiss.
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.