£1M for every century you go back in time

If you take the offer you will be immortal until you get back to the present. This means you will not age, get sick, need food or water and all wounds will heal. However, you will still get hungry, thirsty and feel pain as normal.

Once you reach the present you will be given the money and the opportunity to return to the present timeline.

Would you take the offer? If so how far back would you go?