I don't know whether you have done your calculations but, about two or three years back, I did a first assessment of what the first successful device would be worth and it came out at about 300 trillion dollars.
When my opera Plump Jack was performed in 1989, my first piano teacher sent me something that I'd composed when I was four. I remember I played it, and it still sounded like me. I'm the same composer I was then.