Yes, throughout history anything that goes parabolic has crashed down. So I too am wary.
I have heard of the hyperledger project, but have not fully researched into it. I do know that BTL's interbit is along the same lines as projects on hyperledger and they have mentioned it as well.
I feel that the real usefulness is the blockchain, there is no need for multitudes of coins. Certainly of the hundreds that have popped up, most will remain in obsurity.