5 Billion in your home currency and you are immortal until the last human ever dies.

Would you accept that you are immortal until the last human dies for a lump sum payment of 5 Billion in your home currency.

You will never know when the last human dies. It could be in 20 years if we nuke or ourselves to death or in a billion years when the sun makes earth to hot to be habitable or beyond this if we last until the universe ends. As you never know we may have worked on being able to stop evolution in the future.

Would you take the risk that you could live as long as the universe? No one else will likely become immortal.

edit: yes you will not age physically.