Altcoins are dropping even without fork I don't think alternative coins are really good investment to take, they are highly value when introduce in the market but as the time passes by they lose their worth and all our investment will go into nothing like what happen to most ICO, they distributed it and promise that the value will be appreciated but when the time comes that it can be traded the value drops so bad.
I think what you have to remember when investing in a ICO is it will take time to see the benefits. At least 1 yr IMHO.
1st off as soon as it hits the exchange bounty hunters dump it.
2nd Most projects are only just starting to build the project and get the ball rolling.
Once the project is up and fulling running then people get interested in it and can see its full value.
So only invest money into a project you can just put a side and have a look at maybe a yr or so down the track.
Most of the top altcoins that have seen nice rises lately have been around a while and proven their worth.
Look that's is my option anyway, but i'm no expert