most tokens have a whitepaper link on their website. and many SD tokens have submitted applications to coinmarketcap now. they are pending approval. but there are no shortcuts when doing your research. you must check telegram and twitter to get a real feel for the token. the white paper could sound amazing, but if there's no organic interest, no real community, then owning that crypto would be a mistake.
i would much rather pay more for a token with a proactive developer and strong community than something that looks good at first glance, but is based on smoke and mirrors promo.
besides, the market rewards big valuations. most people want to own the top cryptos trading in a space, and ignore laggards.