Why has Satoshi's vision for the Bitcoin as a peer-to-peer electronic cash system failed?
How did the investors ruin the vision which was similar to the Napster where data was shared at its own expense and received free of charge?
Nothing is free in this world. If you want to provide free service then go ahead - be the altruist and pay for it.
Life will always find a way to verify business plan of every possible endeavour. When Satoshi designed Bitcoin no one could be aware of what future will bring.
We have no idea how Bitcoin will evolve - it is far too soon to cry about it and claim that 'electronic cash system failed'.