The expectation is probably around 1 billion:
10% × 10 billion years (live roughly as long as the universe has existed for already) +
90% × die within 1000 years (likely within 70 for most people here!)
Total: 1 billion
I am ignoring the infinite possibilities since any finite system will start repeating configurations eventually, so I don't think that infinite life for a human even makes sense (you'd just be rerunning the life you already have and I don't think that counts).