It depends how does the investor will use those coins because some of the coins like these have different utitiilies that's the reason why people keep holding the coins but of course it is all depends on the perks some people still goes to the market volatility and choose other coins to get a good profit, and most likely it is have a return higher than the annual percentage profit so people more likely decided to choose it than having the coins less volatile.
If I want to gamble and I see the coins that belong to a gambling site and the price is not that volatile, I may go for it. But if I want to invest for the next bull market, i will prefer to just invest in coins like bitcoin and other common ones like ether, litecoin etc
Thinking about investment is not bad. coz no risk no gain. if you want to make money by any type of business you must accept risk and investment a capital of money. but if your business is crypto based then it will more risk on the other hand you will get more profit then another type of business . so it is not a matter where you invest your money . this is matter that how much risk you can accept and How experienced are you on crypto
But it is still depend on where you invest too, but I will be a little different because my focus is kit betond cryptocurrencies. People decide to invest in one coin more than another. I can decide to invest in both bitcoin or a well know altcoin and also gambling site coin. If I do that, i will prefer to invest most on bitcoin while just very little on gambling site coins. I even checked the marketcap of some of the gambling site coins, i could not se it.