Many coins in the altcoin space are susceptible to the infamous 51% attack. Even Bitcoin is only protected by it's high hash rate.
In contrast advanced checkpointing provides an effective protection against 51% attacks independent of the hash rate of the coin.
The technology was introduced by Peercoin and adapted for the Luckycoin in November 2013. Instead of manual checkpoints that require
a client update, advanced checkpointing automatically synchronizes checkpoints over the network at a predefined depth of the block chain.
The checkpointing system allows the block chain to resolve small forks on it's own without intervention, but enforces consensus if two
different chains grow too large.
Very good explanation of checkpoint on luckycoin. I noticed the coin size is big, 1.5 Gig. There are too many syncing required for luckycoin,
In comparison, Marinecoin or Marycoin size is a lot smaller.
Overall, 51% attack is risk, I believe is mainly to exchange owner, not to regular users.
For the safety of your coin. I recommend trade luckycoin through ShorelineCrypto, but do not leave coin there. Withdraw as much as possible from exchange after trading.
