The way I am thinking this through, and I could be wrong, is that the people who are going to buy NFT's for digital assets, like art, music, pictures, etc. are probably going to be the same people who are really in to crypto as well. So my thinking is that as digital NFT's become more popular, they will probably be bought by a tokens that specializes in the transactions of these digital assets.
As I am learning more about crypto in general, I am trying to find cryptocurrencies that specialize in certain markets. For example, I personally like Polymath because it specializes in the transactions of securities trading. As more retail investors appear in the market, there may be a movement by younger generations to move away from stock exchanges and in to a decentralized model of trading stocks allowing smaller investors to invest in companies, but also for small or locally owned businesses to gain access to capital. To do that, Polymath could be a medium to facilitate such transactions.
That's definitely an interesting idea. Personally, I think NFTs are primarily a fad that is already fading out. But, that's just me.
It is interesting though - that's what all this stuff is, just taking a bet on how things might change in the future. My personal strategy would be to look at which coin is most likely to hold value and be used widely in the future. All these random little coins with highly specific use cases seem likely to go away in the next few years, especially if crypto does gain more mainstream traction. The way I think of things is to ask two questions:
1) Is there a reason that a significant number of people would want to use crypto rather than regular currency? In your decentralized stock trading example, the answer is you're betting yes based on what you said about a possible future desire for decentralized stock trading.
Then question 2:
2) Is there a reason to use a specialized one off coin rather than Bitcoin or Ethereum? I don't personally see what advantage could be gained by using this Polymath coin vs. one of the main two. Using BTC or ETH would achieve the goal of being decentralized, and have the advantage of being more widely used and less likely to become worthless if one particular business fails. This Polymath thing seems like it would go to zero if the specific company and/or business model you're looking at doesn't succeed.
But, I'm also thinking about long term performance in the scale of several years, not something that you could make a quick buck from if the price jumps based on hype and you can sell and take your profit before the whole thing falls apart. If that's what you're looking to do, going for those specialized coins makes sense. Just my two cents though.