Bytme, you are not understanding the most important characteristic about Bitcoin - limited supply.
Apart from being decentralized, that is THE most important thing about it.

Interest, and especially compound interest, do not play well with limited commodities.
However, there is a possibility to built a derivatives market where Bitcoin will the reserve.
Within that market one could have interest bearing instruments.

Otherwise, your idea is just as ridiculous as promising compound interest in gold market.
Where is the extra gold (BTC) would come from? Duh...