A new Bitcoin clone with no adoption and usage yet. No checkpointing. Any Bitcoin ASIC farm could take over the hashrate totally anytime they'd wish. It would absolutely require checkpoints until enough its own ecosystem with miners and security has been established.
Wrong, it happens every day. They're called altcoins. Nobody wastes their time trying to brute force attack coins of no value. There's millions of altcoins nobody bothers to attack. The value of a currency is determined by it's network effect. If the network effect is low, the coin has no value so nobody attacks it. If the network effect is high, the coin value is high and thus the PoW network is sufficient to prevent attacks.
The IPO scamcoins on the other hand have a whole new approach. They have 0 network effect, and thus no value, but that doesn't stop the Eastern Euro scammers (Vitalik, Come from Beyond) from trying to sell them to people for outrageous prices! Who cares if they have no network effect, the coins aren't even technically viable in the first place! BUY BUY BUY.
