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Yeah, I meant this thing. I mean some say that investing in such a fund is less risky when it comes to volatility as you actually buy the portfolio of top-5, top-20 of whatever
On what basis do we determine such list? So far, it seems that the top list is in terms of the market cap which I think don't actually reflect how stable their price is. Not only that, based on the current market condition, it seems that BTC dominance is still great that makes any other crypto beside it gets more volatile when Bitcoin is not in sideways. If there a solution for this, I think it might be interesting to see how crypto index will performs.
As far as I heard, there are such indices created by different companies. And they decide themselves what cryptos and how many of them they'd like to include