Sorry to be so slow to reply. I took a 3 year gap from looking at anything relating to crypto. In the meantime Hashgraph has developed in leaps and bounds. My arguments against Bitcoin remain. It continues to be used as a store of value, but putting value into a storage medium that does nothing with that value seems a waste to me. There are countless problems in the world that need fixing. Progress fixing them requires investment. Rather than put spare value into Bitcoin in cold storage it would be better to invest in worthy projects. The Hashgraph team seem to be making promising progress so I am investigating Hedera and HBAR in greater depth.