I have read many informative opinions from various people on this topic. I understand people love Bitcoin over any other alternative cryptocurrencies and this is absolutely fine.
Bitcoin is a store value and in my opinion, as well Bitcoin is like the USD of the global crypto industry if you try to see in that perspective.

Now, does holding Bitcoin only would help you? Is it a wise choice/decision? Well, this is also a matter of perception but whatever I have learned, one should not put all his capital in one asset. I know there are now multiple cryptos or tokens as per the OP, floating around but out of them there are few that will make it big like Bitcoin. To find this, take nobody's help because life is uncertain and unpredictable.
There is only one thing, just research. Don't read anyone else's research as this world is manipulative.

Holding Bitcoin or any other crypto that is highly volatile for the long term might be a mistake because of liquidity issues and FOMO effect.

Liquidity issue: You require some money and want to encash Bitcoin for some fiat but the market is falling. There is a possibility that you may not find a buyer because buyers will expect it to fall more and then they will buy.

FOMO issue: Whenever the price is falling and we sell it at a lower cost than the ATH(all-time high), most of the people will have this feeling, that the price might have gone up if I could hold it for a few more months maybe.

I would like to conclude by saying, just think, and research on your own. Don't hold on to any crypto for too long unless you don't care about the capital (this is a psychology BTW) and invest in other cryptos and any other blockchain products if your research says it has potential. Trust it.