You should imagine that you are forced to sell it every day. Eventually you'll either sell it (or donate it (your local library might appreciate it)) or start reading it.
OP imagines that there is a point in the future where they read the book without commiting to it. Selling/donating it would put an end to that possibility and force OP to imagine a future where they cannot read it, and hopefully helps them assessing one va the other, and prioritizing accordingly.
You should imagine that you are forced to sell it every day. Eventually you'll either sell it (or donate it (your local library might appreciate it)) or start reading it.