Well there is a little incentive for us to make sure the meme coins die off though. Until then it is fair game. The average person will follow a lot of social media chatter and believe the best hype. So, if we at least market those things that people are going to spend their coins on, then it will help preserve the memes forever.
This is the way majority of the alts in the market is creating the momentum, shilling with the use of social media and creating the hype and so is the reason majority of the coins gained investors.
The only exception to this rule is where the coin is genuinely useful or is backed by a real-world currency. So for example, it wouldn't make sense to invest in a cryptocurrency that has a highly speculative blockchain with no intrinsic value whatsoever. If your blockchain is backed by something tangible then you have a chance of making money, but that's not the case with most crypto.
What is a genuinely useful cryptocurrency, the majority of the coins are speculative and there is no intrinsic value unless you could someone attract the investors to invest in them and if you are able to convince others then it will gets its valuation and that is how all the coins in the cryptocurrency market gained their traction.