Blockchain or Hashgraph? Application potentials and limitations.

I am very new to the crypto market, or blockchain technology. As most did, I started the journey with BitCoin and has since been fascinated about the potential for its application. Steemit is a classical example of the application for digital currency. and thats why I am also invested in KIN/KIK (fan groups https://t.me/kin_tokens) as a long term investment and/or support their projects.

There is a newer competition to blockchain, hashgraph. It presents an alternative DLT to the decentralized concept. Some has gone as far as saying its the end of BTC or blockchain, but I say there is plenty of space for all.

I am intersted to hear from a far more larger audience on ongoing projects, other than finance and security/privacy. Please share if you have implemented these technologies in Health, Public Health or other areas like charitable works. How do you justify transparency in a secret society?

Additional reads:
https://www.technologyreview.com/s/608821/who-will-build-the-health-care-blockchain/
https://www.technologyreview.com/s/608959/why-the-cdc-wants-in-on-blockchain/
https://www.coindesk.com/cdc-trial-blockchain-ibm-bid-manage-medical-data/
https://www.fiercehealthcare.com/mobile/cdc-blockchain-public-health-surveillance-data-sharing

As a public health expert myself, I attest to the need for change. Current case custody processes for long term or life long infection or the simple data sharing processes are extremely outdated.