Bitcoin itself is a very strong investment. If you're investing with anyone other than doog it is probably a -EV move. There are too many ways for operators to swindle investors and nobody has a solid enough reputation or provable scheme to hold investments currently.
I'd just put your coins in coldstorage and check the price every month or so and watch your investment grow (at least in terms of $).
Only in bitcoins or other coins as well?