Graham the problem is that without an exchange people can't decide a real price for a coin, which leaves room for speculation to it's limits, anyway i still think that maybe i'm wrong with the fact that a coin without an exchange can survive more then one year but is only because until now i didn't saw a valid example of a coin that is active without an exchange and is on that status from over one year, as soon i will see such a coin i will change my mind
That's the problem with a narrow price-focused perspective, it fails to account for a whole raft of alternative motivating factors that make perfect sense of a strategy to avoid being listed on an exchange.
Absence of evidence is not evidence of absence. There are altcoins that have currently-active blockchains, have been running for over a year, are not listed on any exchange that I'm currently aware of and do not appear in the lists that you maintain.
You might want to reconsider your position on using coinmarketcap.com's list as authoritative.
I finally got round to formalising the list of exchanges that we curate:
https://minkiz.co/exchangeIt's all open source semantic web data - I created a corresponding
CCE ontology and a
graph of individuals in the semweb “ntriples” format.
The ontology and graph can be processed identically to the DOACC altcoin metadata - documentation is maintained in a
github open source repos as github pages, readable on
https://doacc.github.io/ For Minkiz exchange listing, I added a temporary flag (column “oncmc”, orange check) to indicate which of the exchanges are polled by coinmarketcap.com
Cheers
Graham
