I started staking and it is not earning anywhere near 5% even..

just to try, I put quite a bit in there (in the 6 digits) sitting in a wallet and it's earning more like, 0.5% (Yes I calculated a yearly amount).
The wallet has been open for 3 days now and is unlocked using the encrypted PW. Anything else I need to do?
For each 100K of potcoin, it should be earning about 16 potcoins per day, no?