Investment-wise there's a few worthwhile investments around (none of them mining BTC as primary income source) - but not enough for me to want to run an investment fund (I wasn't running one anyway). Trading has always been where the profit is - simply because making a profit investing requires good underlying investments, whilst trading doesn't. When most securities are shockingly bad it's hard to make a profit from relying on the security actually performing well - far easier to rely on stupid market participants of which there's no shortage.
While I agree with most of that, some users (or customers) don't want to have to know about how the investments work, what is available, what the risk is etc. For that, even sticking cash in a CL account and charging a small fee is not as unreasonable as it sounds. But obviously that would make for a lazy and bad fund manager.
Then again, how many people who bought in to sh*tstorm and smidge's fund wish that those funds just threw the money in CL.