Adding another sci-fi book recommendation that explores these themes; in The Quantum Thief by Hannu Rajaniemi there is a moving city on Mars where citizens that

Adding another sci-fi book recommendation that explores these themes; in The Quantum Thief by Hannu Rajaniemi there is a moving city on Mars where citizens that run out of time, their currency allowing them to live in the city, have their consciousness transferred to machine servants that maintain the city. Being a servant for a number of years earns them enough time to return to their bodies and the city.