I think this too because you do not need to make something as permanent as this (although it an be changed, but that's another cost) as the design of your apartment that you will have a lot of people both with the good and bad intentions visiting.
Just be ready to answer a lot of questions like-
What is this? and after your explanation of what bitcoin is, the next question I think will follow is what was your inspiration behind it, and the reason for it? Do you start explaining then that you got the money to build the house from your investment in bitcoin? that can pose a security risk to you.