Another reason: If you blindly pick any Alts in the top 50 in the last 3 days, most of them have at least increased by 50%, wherein BCH has increased only by around 30%. Still has a lot of headroom I must say. So, buy now for some quick returns of 10% - 20% overnight.
You can't calculate it this way. I do regret keeping my BTC. I should have turned it into altcoins.