I understand CoinMarketCal is news showing latest blockchain updates for altcoins and OpenSea is for NFT's.
On Coinmarketcal how do I filter out all the noise in my search and only list the most relevant important news in my search results?
On Opensea how do I search and filter out so I can find the best buy NFT's in my search results? NFT's that be worth $$$$$$$$ in the future or in this current bull market?
There's is no way for you or anybody else on that matter to know which NFTs would bring 1000x ROI. All CMC does is list the top NFT protocols and tokens, it's up to the viewers to pick which one they buy and invest in.
I would advice you to just focus on the usual factors that helps an NFT gain higher floor prices like who's and how big the community that's behind it, their plans for marketing, how many will be minted and are already minted; You can find most of these details by joining their discord/telegram groups, visiting their website and following their social media channels, not by just starring at those platforms you mentioned.