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 can't actually understand it. I don't say that bitcoin is bad, no, it's great but I used to think that Monero and Ethereum had potential to surpass bitcoin. That's why I think that bitcoin hodling is more important than bitcoin knowledge.
I don't understand why you said knowledge in cryptocurrency isn't beneficial to someone, when it is in fact your main object to avoid getting scammed or put your money in a wrong altcoin.
Well, I have to agree that some of the top altcoin in the market has a better feature than bitcoin, simply because that's the purpose of these altcoin, to fix bitcoin's imperfections. But we all know why bitcoin stays way at the top the rest. Some altcoin may surpass bitcoin in the future, but not in this current timeline.