That's $300 million worth of crypto right now. That's a lot of money. Even if doing it caused the price to drop in half or even by two-thirds, it could still be well worth the attempt.

Micah Zoltu, an independent software developer who is also one of the co-authors of the original white paper for the decentralized prediction market Augur, published a blog post on Monday describing an attack on MakerDAO that, he argued, could empty all the ETH from the system. (Users lock ETH into the Maker protocol to generate loans of the dollar-pegged DAI stablecoin.)