Pre-mine - allocated to the founders or “pre-mine with delay” to allocate after a certain time has passed Auction Hard fork Bitcoin - everyone who owns Bitcoin gets a proportion of the new currency One-way peg - Proof-by-burn of Bitcoin. Altcoin becomes a little less efficient since one has to check both the validity of the altcoin and that the bitcoin block contains the hash of the altcoin block - the bitcoin block does not even have to be valid. That’s why it is possible to merge mine altcoin block faster than bitcoin as well.