Liquidity pool viability study

I'd like to create service on Stellar, that would help liquidity on DEX. It will issue assets like BTC, which won't be possible to redeem for real BTC, but will be following bitcoin price and could be bought for XLM directly or traded against other BTC assets on the network (BTC-naobtc, BTC-interstellar, BTC-apay, BTC-stronghold...).

It would use formula similar to Bancor protocol for setting the price, but we could include some 0.1-0.2% spread to pay off investors.

So for liquidity pool of 1 mln XLM and if we reach 5% of that as daily trading volume (looks realistic, bancor's average 9.8%), that would be roughly 1.8-3.6% APR

* Erforderlich