The difference between HBD and the Luna stuff is mainly that HBD is much much smaller. It is a couple of millions of dollars and Luna was like 100 times that. Also HBD is backed by Hive and the majority of Hive is staked for 13 weeks or more. A meltdown isn't impossible but it would never go at the same speed I believe. There were times when HBD was 0.7 $ and other times when HBD was 3$. So nothing can be totally excluded I believe.