The other issue that if bitcoin rockets, the alts will probably do so as well (from past experience). If bitcoin tanks, so will the alts. I think you need to be in bitcoin (primarily) and if you don't trust it, out into fiat. I see the alts moving with bitcoin currently and I don't see that changing in the near future, until more mainstream adoption and the recognition that there is a difference between them. This will also need most alts (without a valid use case) to die off. Not a popular statement I know, but 900 instruments with no real life application outside of speculation is too many!