IMO It has more to do with Bitcoin price:
1. When BTC price goes up, money from alts and tokens go to BTC like now.
2. When then price goes up too much, some BTC hodlers want to diversify, so they start buying alts and other cryptos go up.
3. Then the bubble on shitcoins pops, money vanish and go back to BTC.
rinse and repeat
The forks from some reason cause BTC price to go up not down. There is indeed the uncertainty but the factor with bigger weight is probably that after the fork everything will be fine etc idea.
The time to "invest" into ICOs was one year ago. If you see ads on Adsense then you are the product. Jesus Christ we are the marketers right? If we do not see through this, then we should be able to imagine the bubble cause by regular people and also how useless **** all the ICOs are.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.