Just have to be careful with staking,

     Staking process:

      Take a transaction -> delete transaction coin -> calculates and add interest -> split in two and create two new transactions -> and so on....

      IE: If you start with  a transaction of 1000 after a while you are going to have almost 1000 transaction of 1 coin !!!!
           .....   for 1M .......  1M transaction of 1 coin !!!!


     Potential Problem:  If you have too many transaction in your wallet the performance and the processor go up. You will have difficulties to send important sum as the wallet have to combine lot of small transaction...... (I already have that problem on similar wallet with similar POS).