Can somebody explain this situation with Cloak why is up when everything else is sinking? 
logically altcions are not and should not be connected to bitcoin price. they must act separately and on their own. but realistically this never happens. whenever bitcoin has dropped all the rest of them dropped harder with it.
but exceptions like this happens all the time. if you look at the market in past 24 hours you will always, without exception, see at least 2 coins rising. that is the altcoin pumpers hard at work.
looking at coinmarketcap today's coins were GAS, Edgeless and Cloak
Yes, no one has yet been able to give a satisfactory reason as to why altcoins do NOT follow the logical path of self determination. And like you said, all these alts that rise when others drop is purely the effort of pumpers with BTC at hand ready to stop the red wave. Will we ever know which coins will these be for the next bear? Unfortunately I won't...