Mintpal could very easily lose or "lose" our coins at any moment. I have nothing against Mintpal in particular, but this (exchanges suddenly disappearing) is happening all the time in cryptoworld.
What is absolutely important is that we concentrate all efforts in
avoiding something as the Spaincoin fiasco. Cataloniacoin will only have any value if it reaches
thousands of adopters in November's airdrop. For this, we need a POS service with SEPA transfers (thus zero-fee to most) accepting Cataloniacoin. We also need to fork Mycelium for local Cataloniacoin trades (which maybe merchants could use as a POS?).
Having miners outside Catalonia is not a bad idea - they secure the chain after all - but they will be more prominently dumping their minings. Mintpal/cryptsy etc. will only increase this effect.
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Certificate-based generation
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A somewhat more radical approach to achieve mass adoption and fair distribution would be to avoid any airdrop at all. You could simply pre-assign an equal share of coins to every person (based on DNI or government-issued certificates): the monetary base will proportionally scale with coin adoption, i.e., no rational reason for speculative hoarding nor for dumping (guaranteed scarcity).
This can be made by relaunching without the premine and with a protocol modification instead: at any block, a coinbase can be generated through proof-of-identity, which is essentially showing an unseen ID number and its valid signature. Fraud is not possible as long as the ID issuer can re-issue certificates but always to the same ID number (yes, Spain is a tightly controlled police state). Theft is possible, but it implies stealing the certificate token and its passphrase (i.e., a full extent identity theft).
Most importantly, we do not need to check for expired or revoked certificates at mining time: we can let some nodes do the DB queries and let them issue proofs of revocation before the coinbase maturity for a small reward (to avoid spam, these proofs of revocation would need to burn some coins and be rewarded only if the miner confirms the revocation; also, blocks include only one such transaction per certificate - the rest are rejected without burning or reward).
Finally, since this already implies a hard fork, I would suggest that Cataloniacoin is relaunched as a Bitcoin sidechain.
edit: "proofs"
All national altcoins ( auroracoin , spaincoin , greececoin , etc. ) have been a fiasco for the simple reason that when preminadas in full, any investor believes (rightly ) that the millions of coins that are not claimed , will be overturned by the developers. For CATC may have future, it is imperative that a good deal is made, however :
What will happen to the unclaimed you will surely millions ?
I think the only way to gain confidence could donate for safekeeping (not for sale in at least 2 years ) to any such association ANC.
ANC has every confidence the Catalans.
Moreover, it is imperative the adoption by businesses , but that should be listed somewhere ( a trader can not know the selling price of a product , if it has a price tag of some exchange ) .
Over 2 years ago and Altcoins BTCs trade groups, in Bitstamp , BTC -E, Cryptsy , Mintpal , Swiccex and CATC are not any better than me Mintpal exchange occurs .