Possible any number above 10% creates risk, not necessary we will see it now at low hive price, but eventually with next bull period if people start cashing out to HBD and we will get closer to 30%, eventually price will drop and some funny events may occur.

That should read "Possible any number above zero creates risk". Surely noone loses many with 0.1%-haircut-imaginary-HBD as there is not enough of those out to bother. Sooner or later, any number gets there, 10% or 30%. The good thing about the architecture is that it clearly defines who the losers are. If HIVE price inflates due to HBD success, and the troubles hit during a bear, it is going to add some selling pressure from people who would feel cheated (in fact they didn't RTFM) at the worst moment possible but since the Hive network still has value outside HBD, there is no need to crash all the way to $0 HIVE (Luna style).