Tripling your money in a week, assuming you sold today and bought that day.

Does anyone know how small the market cap of Darkcoin has to be for it to be the conventional currency for money laundering (with bitcoin in between of course)? This is when I plan to withdraw, when the marginal return of its most robust reason for winning becomes negligible.

How much needs to be laundered daily these days? Are there good sources on black markets?