Security has become one of the biggest risks in the crypto ecosystem.

Data from DefiLlama shows that about $17 billion has been stolen across 518 crypto hacks since 2016. On average, this means the industry has experienced roughly one major exploit per week over the past decade.

A common misconception is that most losses come from smart-contract bugs. In reality, a large share comes from private key compromises—including phishing attacks, weak security practices, and stolen credentials. These incidents alone account for over $3.6 billion in losses.

Recent years have also seen larger individual incidents.

For example, the rsETH bridge exploit linked to Kelp DAO resulted in losses of roughly $290–292 million, making it one of the largest decentralized finance exploits reported in 2026 so far.

For participants in decentralized finance, this highlights an important lesson:

market volatility is not the only risk—security practices matter just as much.

Basic precautions often recommended include:

Using hardware wallets for long-term holdings

Never sharing seed phrases or private keys

Avoiding links and applications that cannot be verified

Carefully reviewing permissions before interacting with smart contracts

Understanding these risks is an important part of learning how the crypto ecosystem works.

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