I need to have a good look at Hashgraph to see if it's a legit alternative to Blockchain, but even if you ignore Proof of Stake or Graphene technology there are better Proof of Work blockchains out there than Bitcoin.
I would love to see a decentralised Gold pegged Crypto. I wrote about STEEM GOLD a while back, but now that STEEM DOLLARS have blown the peg I'm not sure if that would work. The important thing is there should not need to be a centrally managed repository of gold, otherwise we have a big point of failure.
It'd be great to have the best of both worlds with Gold and Crypto effectively merged. It's good to have a dream :)