If you're interested in Bitcoin NFTs (Counterparty tokens -- which are pretty solid and likely to outlast the Ordinals craze), I recommend checking out their DEX & dispensers:
https://xchain.io/
Same thing with Dogeparty, there's a lot of sleepers (like Rare Doges) out there that have a good chance of commanding more value for collectors in years to come:
https://dogeparty.xchain.io/
This is a site that specifically tracks Rare Pepe sales on both Counterparty and OpenSea:
https://pepe.wtf/
As far as long-term investments go, I think Rare Pepes & other early Counterparty tokens (from 2014-2017) are the best bet and outline why in this thread.
Finally, I also really like Monaparty tokens as they have a vibrant community of artists, plus they are dirt cheap:
https://monapalette.komikikaku.com/shops
https://monapalette.komikikaku.com/dispensers