The dynamic interest is invented for bagholding (i.e) the more you hold, more the interest. So you will naturally be tempted to stake as much as coins as possible.
So when many coins are staked, the supply is lowered, that which increases the demand.

Lets consider you are holding 1 million pesa for staking and earning a interest of 200 pesa's a day.
Today 200 pesa's aren't worth a few dusts of btc.
May be once we have enigma, sms & smart contracts implemented and the value had gone for around 20k sats, you will be earning around .08 btc's per day.