How about a physical bitcoin or crypto wallet? This will allow him to securely store his bitcoins while having a tangible representation of his favorite cryptocurrency. You can also get him a book about bitcoin or perhaps some bitcoin-themed merchandise like a mug or a t-shirt. Another option is to enroll him in a course to learn more about cryptocurrency or to attend a bitcoin-related conference near you. Perhaps organize a virtual event with some of his friends who are interested in this topic or maybe even plan a trip to a major blockchain conference in the near future.
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.