Ive been following bitcoin since 2011 or so. I must have seen nearly 1000 BTC denominated investment instruments come and go, and I remember all of 2 that made their investors a positive ROI; ActiveMiner, which was high risk but did pan out,  and SatoshiDice, even though that profit was extremely limited for investors,  and mostly went to Eriks own wallet. So if you ask me now which is the third one, I dont see it yet, unless you can find ways to short sell all those junk bonds and shares.

In the meanwhile, cold wallets have grown in value ~10000% in just a few short years. I dont get why people insist on looking for maybe a few % on top of that, at a (usually)  enormous risk or even near certainty of loss.  I also dont get how people think BTC is even a good investment instrument. How many people try to invest their gold? A growing economy creates more fiat money, it doesnt create more gold, nor more bitcoins.