One unique and meaningful wedding gift idea for your friend who loves Bitcoin could be to purchase them a small amount of Bitcoin and then have it digitally engraved with a personalized message, such as their wedding date and their names. This could be done through various online services that specialize in engraving digital assets. Additionally, you could consider purchasing a physical Bitcoin wallet that is designed to safely store their cryptocurrency. This would not only be a thoughtful gift but also an excellent way to support their interests and passions on their special day.
Or you can get her/him a star map with the date of the wedding.
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.