Actually because of the bug with the block times

you will notice if you look at the block explorer that the difficulty is seriously low and will never go high

A lot of the time the same wallet can stake block after block because of the super low difficulty.

So an attacker would not need that many coins to stage a 51% attack because once the attacker gets a block you have a huge advantage that they can already work at the next block which takes sometimes less than 1s before other nodes even know you have the block.

So a would be attacker could do a "cheap" 51% attack on this coin with enough coins staking, the bug makes it insecure.