Now a days all alt coin markets has been dumping and dumping without any simple pump for the btc price increasing.So just i want to know that can bitcoin destroy the maximum type of alt coins market?
No. It cannot, understand these pumps and dumps just like the stock market. Bulls and bears buy or sell in order to make the markets volatile and for their own benefit. These altcoins will get pumped and dumped, and after sometime again the same thing will happen. Altcoins are the essence of trading and if most of them die, then the markets would become nothing but shit.
Pumps and dumps happen all the time, that's how trading works and if people are scared to invest in anything then let them just keep the money idle.