Yes but on t-1 your 1% of spacex also represented 1% of boring company - which you were paying to devlop. At t+1 you owned 1% of spacex and 0% of boring company.
If you want to sell your shares for 0$ that is up to you. On the flip side, I am happy to look through your personal holdings, and anything I think is worth $0, take for myself. You wouldnt mind now would you?