Not only Bitcoin can be held long, but also there are some altcoins that can be held with good profits in the future. As investment is your personal decision I am not asking you to invest in any altcoin. Risk is in all coins including Bitcoin, I think some top altcoins like Ethereum, BNB, Solana, Litecoin can expect better profit from long term. Seeing the top altcoins follow Bitcoin in price growth, I believe the mentioned altcoin investment will yield good profits.
That is true that other altcoins are also good for long term holding just as Bitcoin. Your reliance to altcoins will also depend your profitability.
Not all altcoins are worth to risk because you'll have no idea when they'd be dumped by the majority of its holders.
Just as what you believe, we're on the same page that the old top coins are still better choices.