Thanks for full answer. The scheme looks a bit complicated for me. As I got it, the covering coins are going from miners who are obliged to pay to interest pool. But what the incentives for them to do this? Is this profitable to mine BCI and pay to interest pool?
That is incorrect. The miners get 100% of the 12.5 BCI rewards from the block, same like mining Bitcoin or Bitcoin Cash. Only that the BCI dev develop another interest block out of the block with the amount of 1.08 BCI for each block. The interest pool is from the block and not from the miners.
Besides, in such scheme the interest payed to holders should depend on degree of pool's filling. What happens if miners will go away from BCI ?
Thats where the agreement with Genesis Mining comes in. Genesis Mining already mined BCI to protect the blockchain.