I don't understand why there's a need to blame altcoins for that? Well, I don't like a lot of altcoins for some reasons and because they're not really shouldn't be in the market as they are scammy and dividing the people. But there's no blame for someone's loss to altcoins if they've chosen to invest on this market.
You win and get some profits from investing in Bitcoin and even it's the most suggested crypto of all. Doesn't mean that you're safe and you're not going to experience the harsh environment of this market because of its volatility. We're all going to have losses, paper losses and permanent losses but you choose what type of loss you will have because paper losses are temporary.