Bitcoin is different from other cryptocurrencies in many ways. It stands first before the rest of the cryptos and I do not take anyone who promotes any other crypto aside bitcoin serious. I always feel that there is a sinister motive behind it. Because why should anyone promote a less secure, highly unscalable and centralized asset over bitcoin.
With the spot bitcoin ETF, the easiest ways to add bitcoin to ones portfolio is seamlessly assured and there won't be all the need to own exchange accounts, digital wallets, private keys and bother about network transfers or the fees to pay, that may be varying at the time.
I wouldn't recommend bitcoin ETF. research about the real bitcoin and buy the real bitcoin, learn about private keys, learn how to hold it yourself in an airgapped wallet, learn about its security.