It will not ever mutate into a hemorrhagic fever and it is not mutating fast or crazy. It is so confined in its mutations that the vaccine made against the original 2019 strain still works against all known variants. We don't know of any that can beat the vaccines we already have and there don't seem to be any new changes we haven't seen. There are only about 50 spots on the spike that can mutate without the virus becoming incompatible with humans. The mutations in the Omicron variant aren't new, only the collection is. For instance, one of the Omicron mutations is N501Y. That means at the 501st position of the spike protein the N (asparagine) amino acid of the original 2019 Wuhan COVID19 was replaced by a Y (tyrosine) amino acid. That exact same N501Y mutation was present in the Alpha (a.k.a. UK variant), Beta variant, Gamma, and Delta variant. Of all the mutations in Omicron, I do not believe there is a single one that has not been seen before in other variants.
The variations we are seeing is like taking a random number of cards out of a deck of cards. The collection in your hand may be unique but it is made up from the same 52 cards you have already seen. No matter how many times you draw a new collection you aren't going to find something crazy like a Uno Draw-4 card appear in your hand.