Yes, a lot of people are moving away from alt-coins so they can get bitcoin into their wallets for the fork(s). Many people will get their Bitcoin Gold and Bitcoin SegWit2x and sell them immediately, then move into alt coins again. Remember Warren Buffet's rule of investing:
I definitely agree with this, most people likely to go and gamble their money due to their mindset that it'll be double the amount that they have. People would likely prefer to invest in coins that they think will double up the amount that they invested. But I do recommend that Bitcoin is the most preferable coin as of now we to invest on, due to it's value, and I think it's worth is already that enough for us to be convinced to invest on.