I'm here to clear few facts about some crypto coins, i will start with exchange tokens, people are getting things mixed up when it comes to real use case, many thinks once a coin has a real use case it's a must buy well this is for you, let me start with binance, i love the exchange simply because of the seriousness of the team and CEO himself i believe that's why they made it this far but im not 100% sure about bnb token because it's use case ends on the binance exchange, outside the platform it's nada, i belief any good real use case should be for the public but bnb token is limited in this area, everything about bnb ends on it's exchange.
My second point is pointing towards Proof of Stake coins, we all love earning with no big hassle like POW coins but at the same time have you ever think that apart from the POS ability what is the use case of the token or coin itself? Many keep making this mistake that once a coin has staking ability it's the best, this is why many POS coins loses value while you are holding them to get your reward annually.
I believe that POS ability is just a +, assuming the use case of a coin is for means of payments either with many merchants or so and the coin still has staking ability makes more sense than a coin with just staking ability alone, please be wise with the ways you define your real use cases
We all know the fact that a lot of coins have no long term utility whatsoever. That is common knowledge.
Unfortunately though with the way that the market is set up, it is set up in a way where it rewards short term risk taking in which certain coins with absolutely no or little value in the long term could and have seen significant growth. This could include the tokens that you're talking about, whether PoS or exchange tokens.
At the end of the day if you're looking at long term stuff, obviously you want to avoid them. But it doesn't necessarily deter people from investing in the short term.
. And we will sell them these altcoins and buy Bitcoin! 
