Have you discovered some token were disappearing within the market at this period. Such as Bitboost just suddenly disappeared away from market without prior awareness. Should that be? Is that not a cheat?
All we need is demand of the token or coin to show the growth. If there is no demand and circulation on the any coins in some days or weeks automatically exchanges will drop from their site as well listing sites also do the same.
So if you are the investor you must need to verify the marketplace before investing on such coins. May be if that coin delisted then your money will go away buddy.