2) After Mike received bitcoin-backed loans: Mike’s total investments made up 3.11728857 BTC or $28,500 at the Bitcoin price of 9,142 USD. After 14,8% increase in Bitcoin price, the cost of his investment on Biterest account balance increased to $32,718.
Mike’s used loan limit made up $18,500 + $185 of accured interest 30 days later (1% per month). Mike chose to repay the loan ($18,685) with bitcoin from his account balance ($32,718).