I contend that most cryptocurrencies have basically been riding Bitcoin's slipstream in terms of attention, adoption, and market performance. Altcoins have high beta values in cryptocurrency, which produces enticing opportunities, especially during "Mania" phases of market cycles. Everyone wants to beat The Market, and it's a natural (if misguided) assumption of newcomers that they are "too late" to profit considerably from Bitcoin, the de facto standard and baseline of cryptocurrency.

What this means in practice is that non-Bitcoin cryptocurrencies will almost certainly never completely disappear, but it's very possible that their relative valuations are still temporarily overinflated and that Bitcoin's compounding Network effects and status as a focal point, in particular in tandem with the Lindy effect, will result in a continuance of its historical performance dominance over other tokens (particularly in aggregate and over the long-term).