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diversification, probably, but even in this case, the negative waves send in the entire crypto world will affect the value of other assets.

in an ideal world, exchanges shouldn't show support to vulnerable coins, but they do, because money.

because not only money but extra money and people are greedy, as it stands bch wasn't even a market cap not too long ago now it's a couple of billions, why? probably the new bitcoin train and hype as always ....

Yes, that would cause large negative ripples across the entire crypto market.