Three possibilities:

1. He is a hypochonda and is scared of life.

2. He is scared about the upcoming anger of the humanity over EPSTEIN, MONEY and the rest of his Repto gang.

3. He knows something that the rest of us don't know and wont tell to the public. 3 days of darkness?

Or it is all 3 together + the warm temperature which is not made for Reptos.

I'll take it like 2Pac said.

"My only fear of death is reincarnation."