Personally I can say that knowledge in cryptocurrencies isn't very beneficial because ask yourself, why is bitcoin popular? And then compare possiblities of bitcoin to Monero. Everyone will tell you that bitcoin is decentralized, anonymous, etc... But then there is a monero. Logically, Monero should be the number one cryptocurrency and not bitcoin because monero is decentralized where every user is anonymous by default. Then there is an ethereum that offers a lot of features unlikely to Bitcoin but still bitcoin is number one currency.
I agree that the coins you mentioned are good but are they compatible with Bitcoin? Where Bitcoin's supply is limited, there is no limited supply in any of the ones you mentioned, which is an important factor for me when it comes to accepting Bitcoin. Bitcoin far surpasses those coins in terms of acceptance and popularity. In case of mentioned coins can increase their supply if desired. As a result, there is uncertainty about how reliable those coins can become in the long run. While investing in Bitcoin over a long period of time, there is a possibility, it is not guaranteed but we can surpass its previous highs. Here I don't think money is important but dependability is important for me. We can expect 10x in the long-term but can i keep confidence in the altcoins in long-term?