I do not see the rise of cryptocurrencies as a
zero sum game. I think the healthiest future will be one of many competing currencies.
Bitcoin will thrive by remaining competitive.
A store of value needs to be a public ledger and gold did that quite well. If you have any amount of stores of value, you will have horrible qualities as store of value for each of them. Check out
https://www.youtube.com/watch?v=gKkfhi8Eaiw . I love this video as it opened my eyes in many aspects.
I don't mind alt-coins for payment networks or other things but not as store of value. Lets figure out how to do sidechains.