If you choose to invest only in Bitcoin, than what is diversification? Investing in one and only one asset is no diversification at all.
I think, a lot of altcoins are falling towards Bitcoin, especially if we look at them in a long perspective. But a good trader can also profit on that, if he knows how to short. I wouldn't say that everything else except bitcoin is gambling. But it requires a lot of preparation and previous analysis.
Huh?. Bitcoin is a new class of asset. Cryptocurrency, blockchain asset, whatever you wanna call it. If you call yourself an investor, then you already have stocks, real estate, maybe precious metal. Adding Bitcoin is a diversification strategy. Adding 5% of your portfolio to Bitcoin diversifies your portfolio. Adding 5% but inside Bitcoin is 10%, NFT and shit is 90%, that's not diversification that's dilution.
You're talking about trading, which is what I said, gambling without understanding.