I have the impression that every-time bitcoin starts climbing steadily, the XRP pumps like crazy 100%+ within 24h, causing doubt in the entire market!
Are altcoins like stellar and xrp harming the bitcoin price by their manipulated pumps ?
I dont think so! Bitcoin dominance in the Market Cap is more than half, thats why it is not possible for any "Altcoin pumps" to harm the price of Bitcoin.
But it most likely happens, that if the Bitcoin price will go down, it has a huge effect on the price of most altcoins in the market. Because I believe that altcoins value is partially tied up with Bitcoin price and market movement.